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Finding the Fourth Proportional to 578,751.40, 868,127.10 and 389,794.60

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Solution

The fourth proportional to 578,751.40, 868,127.10 and 389,794.60 is: 584,691.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,751.40 : 868,127.10 = 389,794.60 : x
  2. Step 2: Convert to fraction form
    578,751.40/868,127.10 = 389,794.60/x
  3. Step 3: Cross multiply
    578,751.40x = 868,127.10 × 389,794.60
  4. Step 4: Simplify right side
    578,751.40x = 338,391,255,693.66
  5. Step 5: Solve for x
    x = 338,391,255,693.66/578,751.40
  6. Step 6: Final answer
    x = 584,691.90

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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.