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Finding the Fourth Proportional to 657,139.61, 906,853.65 and 355,333.61

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Solution

The fourth proportional to 657,139.61, 906,853.65 and 355,333.61 is: 490,360.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,139.61 : 906,853.65 = 355,333.61 : x
  2. Step 2: Convert to fraction form
    657,139.61/906,853.65 = 355,333.61/x
  3. Step 3: Cross multiply
    657,139.61x = 906,853.65 × 355,333.61
  4. Step 4: Simplify right side
    657,139.61x = 322,235,581,196.18
  5. Step 5: Solve for x
    x = 322,235,581,196.18/657,139.61
  6. Step 6: Final answer
    x = 490,360.92

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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.