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Finding the Fourth Proportional to 393,061.04, 542,420.94 and 220,979.75

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Solution

The fourth proportional to 393,061.04, 542,420.94 and 220,979.75 is: 304,950.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,061.04 : 542,420.94 = 220,979.75 : x
  2. Step 2: Convert to fraction form
    393,061.04/542,420.94 = 220,979.75/x
  3. Step 3: Cross multiply
    393,061.04x = 542,420.94 × 220,979.75
  4. Step 4: Simplify right side
    393,061.04x = 119,864,041,003.86
  5. Step 5: Solve for x
    x = 119,864,041,003.86/393,061.04
  6. Step 6: Final answer
    x = 304,950.20

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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.