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Finding the Fourth Proportional to 424,274.47, 636,688.72 and 158,247.79

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Solution

The fourth proportional to 424,274.47, 636,688.72 and 158,247.79 is: 237,475.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,274.47 : 636,688.72 = 158,247.79 : x
  2. Step 2: Convert to fraction form
    424,274.47/636,688.72 = 158,247.79/x
  3. Step 3: Cross multiply
    424,274.47x = 636,688.72 × 158,247.79
  4. Step 4: Simplify right side
    424,274.47x = 100,754,581,464.02
  5. Step 5: Solve for x
    x = 100,754,581,464.02/424,274.47
  6. Step 6: Final answer
    x = 237,475.01

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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.