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Finding the Fourth Proportional to 657,724.50, 907,660.62 and 355,918.50

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Solution

The fourth proportional to 657,724.50, 907,660.62 and 355,918.50 is: 491,167.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,724.50 : 907,660.62 = 355,918.50 : x
  2. Step 2: Convert to fraction form
    657,724.50/907,660.62 = 355,918.50/x
  3. Step 3: Cross multiply
    657,724.50x = 907,660.62 × 355,918.50
  4. Step 4: Simplify right side
    657,724.50x = 323,053,206,379.47
  5. Step 5: Solve for x
    x = 323,053,206,379.47/657,724.50
  6. Step 6: Final answer
    x = 491,167.97

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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.