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Finding the Fourth Proportional to 657,290.38, 907,060.72 and 355,484.38

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Solution

The fourth proportional to 657,290.38, 907,060.72 and 355,484.38 is: 490,568.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,290.38 : 907,060.72 = 355,484.38 : x
  2. Step 2: Convert to fraction form
    657,290.38/907,060.72 = 355,484.38/x
  3. Step 3: Cross multiply
    657,290.38x = 907,060.72 × 355,484.38
  4. Step 4: Simplify right side
    657,290.38x = 322,445,913,136.25
  5. Step 5: Solve for x
    x = 322,445,913,136.25/657,290.38
  6. Step 6: Final answer
    x = 490,568.44

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.