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Finding the Fourth Proportional to 657,188.88, 906,920.69 and 355,382.88

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Solution

The fourth proportional to 657,188.88, 906,920.69 and 355,382.88 is: 490,428.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,188.88 : 906,920.69 = 355,382.88 : x
  2. Step 2: Convert to fraction form
    657,188.88/906,920.69 = 355,382.88/x
  3. Step 3: Cross multiply
    657,188.88x = 906,920.69 × 355,382.88
  4. Step 4: Simplify right side
    657,188.88x = 322,304,086,743.79
  5. Step 5: Solve for x
    x = 322,304,086,743.79/657,188.88
  6. Step 6: Final answer
    x = 490,428.39

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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.