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Finding the Fourth Proportional to 310,382.34, 465,499.70 and 85,737.80

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Solution

The fourth proportional to 310,382.34, 465,499.70 and 85,737.80 is: 128,586.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,382.34 : 465,499.70 = 85,737.80 : x
  2. Step 2: Convert to fraction form
    310,382.34/465,499.70 = 85,737.80/x
  3. Step 3: Cross multiply
    310,382.34x = 465,499.70 × 85,737.80
  4. Step 4: Simplify right side
    310,382.34x = 39,910,920,178.66
  5. Step 5: Solve for x
    x = 39,910,920,178.66/310,382.34
  6. Step 6: Final answer
    x = 128,586.31

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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.