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Finding the Fourth Proportional to 474,656.80, 711,985.20 and 400,007.20

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Solution

The fourth proportional to 474,656.80, 711,985.20 and 400,007.20 is: 600,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,656.80 : 711,985.20 = 400,007.20 : x
  2. Step 2: Convert to fraction form
    474,656.80/711,985.20 = 400,007.20/x
  3. Step 3: Cross multiply
    474,656.80x = 711,985.20 × 400,007.20
  4. Step 4: Simplify right side
    474,656.80x = 284,799,206,293.44
  5. Step 5: Solve for x
    x = 284,799,206,293.44/474,656.80
  6. Step 6: Final answer
    x = 600,010.80

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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.