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Finding the Fourth Proportional to 261,787.89, 392,681.82 and 84,312.84

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Solution

The fourth proportional to 261,787.89, 392,681.82 and 84,312.84 is: 126,469.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,787.89 : 392,681.82 = 84,312.84 : x
  2. Step 2: Convert to fraction form
    261,787.89/392,681.82 = 84,312.84/x
  3. Step 3: Cross multiply
    261,787.89x = 392,681.82 × 84,312.84
  4. Step 4: Simplify right side
    261,787.89x = 33,108,119,460.57
  5. Step 5: Solve for x
    x = 33,108,119,460.57/261,787.89
  6. Step 6: Final answer
    x = 126,469.26

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1.5x scale

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.