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Finding the Fourth Proportional to 664,401.40, 996,602.10 and 660,464.80

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Solution

The fourth proportional to 664,401.40, 996,602.10 and 660,464.80 is: 990,697.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,401.40 : 996,602.10 = 660,464.80 : x
  2. Step 2: Convert to fraction form
    664,401.40/996,602.10 = 660,464.80/x
  3. Step 3: Cross multiply
    664,401.40x = 996,602.10 × 660,464.80
  4. Step 4: Simplify right side
    664,401.40x = 658,220,606,656.08
  5. Step 5: Solve for x
    x = 658,220,606,656.08/664,401.40
  6. Step 6: Final answer
    x = 990,697.20

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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.