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Finding the Fourth Proportional to 680,858.92, 939,587.97 and 408,931.43

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Solution

The fourth proportional to 680,858.92, 939,587.97 and 408,931.43 is: 564,326.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,858.92 : 939,587.97 = 408,931.43 : x
  2. Step 2: Convert to fraction form
    680,858.92/939,587.97 = 408,931.43/x
  3. Step 3: Cross multiply
    680,858.92x = 939,587.97 × 408,931.43
  4. Step 4: Simplify right side
    680,858.92x = 384,227,052,182.90
  5. Step 5: Solve for x
    x = 384,227,052,182.90/680,858.92
  6. Step 6: Final answer
    x = 564,326.98

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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.