Home / 865,887.90-1,297,957.05-392,912.70

Finding the Fourth Proportional to 865,887.90, 1,297,957.05 and 392,912.70

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Solution

The fourth proportional to 865,887.90, 1,297,957.05 and 392,912.70 is: 588,972.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,887.90 : 1,297,957.05 = 392,912.70 : x
  2. Step 2: Convert to fraction form
    865,887.90/1,297,957.05 = 392,912.70/x
  3. Step 3: Cross multiply
    865,887.90x = 1,297,957.05 × 392,912.70
  4. Step 4: Simplify right side
    865,887.90x = 509,983,808,999.54
  5. Step 5: Solve for x
    x = 509,983,808,999.54/865,887.90
  6. Step 6: Final answer
    x = 588,972.09

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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.