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Finding the Fourth Proportional to 657,665.92, 907,581.78 and 355,859.92

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Solution

The fourth proportional to 657,665.92, 907,581.78 and 355,859.92 is: 491,088.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,665.92 : 907,581.78 = 355,859.92 : x
  2. Step 2: Convert to fraction form
    657,665.92/907,581.78 = 355,859.92/x
  3. Step 3: Cross multiply
    657,665.92x = 907,581.78 × 355,859.92
  4. Step 4: Simplify right side
    657,665.92x = 322,971,979,624.26
  5. Step 5: Solve for x
    x = 322,971,979,624.26/657,665.92
  6. Step 6: Final answer
    x = 491,088.21

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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.