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Finding the Fourth Proportional to 637,286.40, 955,929.60 and 438,220.80

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Solution

The fourth proportional to 637,286.40, 955,929.60 and 438,220.80 is: 657,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,286.40 : 955,929.60 = 438,220.80 : x
  2. Step 2: Convert to fraction form
    637,286.40/955,929.60 = 438,220.80/x
  3. Step 3: Cross multiply
    637,286.40x = 955,929.60 × 438,220.80
  4. Step 4: Simplify right side
    637,286.40x = 418,908,234,055.68
  5. Step 5: Solve for x
    x = 418,908,234,055.68/637,286.40
  6. Step 6: Final answer
    x = 657,331.20

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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.