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Finding the Fourth Proportional to 284,437.70, 392,520.62 and 155,374.59

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Solution

The fourth proportional to 284,437.70, 392,520.62 and 155,374.59 is: 214,415.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,437.70 : 392,520.62 = 155,374.59 : x
  2. Step 2: Convert to fraction form
    284,437.70/392,520.62 = 155,374.59/x
  3. Step 3: Cross multiply
    284,437.70x = 392,520.62 × 155,374.59
  4. Step 4: Simplify right side
    284,437.70x = 60,987,730,787.48
  5. Step 5: Solve for x
    x = 60,987,730,787.48/284,437.70
  6. Step 6: Final answer
    x = 214,415.08

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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.