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Finding the Fourth Proportional to 657,123.90, 983,842.65 and 638,691.90

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Solution

The fourth proportional to 657,123.90, 983,842.65 and 638,691.90 is: 956,246.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,123.90 : 983,842.65 = 638,691.90 : x
  2. Step 2: Convert to fraction form
    657,123.90/983,842.65 = 638,691.90/x
  3. Step 3: Cross multiply
    657,123.90x = 983,842.65 × 638,691.90
  4. Step 4: Simplify right side
    657,123.90x = 628,372,331,429.54
  5. Step 5: Solve for x
    x = 628,372,331,429.54/657,123.90
  6. Step 6: Final answer
    x = 956,246.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.