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Finding the Fourth Proportional to 664,301,972.40, 996,452,958.60 and 660,475,597.20

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Solution

The fourth proportional to 664,301,972.40, 996,452,958.60 and 660,475,597.20 is: 990,713,395.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,301,972.40 : 996,452,958.60 = 660,475,597.20 : x
  2. Step 2: Convert to fraction form
    664,301,972.40/996,452,958.60 = 660,475,597.20/x
  3. Step 3: Cross multiply
    664,301,972.40x = 996,452,958.60 × 660,475,597.20
  4. Step 4: Simplify right side
    664,301,972.40x = 658,132,862,913,041,920
  5. Step 5: Solve for x
    x = 658,132,862,913,041,920/664,301,972.40
  6. Step 6: Final answer
    x = 990,713,395.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.