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Finding the Fourth Proportional to 664,648.40, 996,972.60 and 265,350.80

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Solution

The fourth proportional to 664,648.40, 996,972.60 and 265,350.80 is: 398,026.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,648.40 : 996,972.60 = 265,350.80 : x
  2. Step 2: Convert to fraction form
    664,648.40/996,972.60 = 265,350.80/x
  3. Step 3: Cross multiply
    664,648.40x = 996,972.60 × 265,350.80
  4. Step 4: Simplify right side
    664,648.40x = 264,547,476,988.08
  5. Step 5: Solve for x
    x = 264,547,476,988.08/664,648.40
  6. Step 6: Final answer
    x = 398,026.20

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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.