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Finding the Fourth Proportional to 393,315.92, 542,776.20 and 223,550

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Solution

The fourth proportional to 393,315.92, 542,776.20 and 223,550 is: 308,499.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,315.92 : 542,776.20 = 223,550 : x
  2. Step 2: Convert to fraction form
    393,315.92/542,776.20 = 223,550/x
  3. Step 3: Cross multiply
    393,315.92x = 542,776.20 × 223,550
  4. Step 4: Simplify right side
    393,315.92x = 121,337,619,510.00
  5. Step 5: Solve for x
    x = 121,337,619,510.00/393,315.92
  6. Step 6: Final answer
    x = 308,499.13

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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.