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Finding the Fourth Proportional to 453,713.20, 680,569.80 and 121,289.20

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Solution

The fourth proportional to 453,713.20, 680,569.80 and 121,289.20 is: 181,933.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,713.20 : 680,569.80 = 121,289.20 : x
  2. Step 2: Convert to fraction form
    453,713.20/680,569.80 = 121,289.20/x
  3. Step 3: Cross multiply
    453,713.20x = 680,569.80 × 121,289.20
  4. Step 4: Simplify right side
    453,713.20x = 82,545,766,586.16
  5. Step 5: Solve for x
    x = 82,545,766,586.16/453,713.20
  6. Step 6: Final answer
    x = 181,933.80

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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.