Home / 865,865.40-1,297,923.30-392,890.20

Finding the Fourth Proportional to 865,865.40, 1,297,923.30 and 392,890.20

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Solution

The fourth proportional to 865,865.40, 1,297,923.30 and 392,890.20 is: 588,938.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,865.40 : 1,297,923.30 = 392,890.20 : x
  2. Step 2: Convert to fraction form
    865,865.40/1,297,923.30 = 392,890.20/x
  3. Step 3: Cross multiply
    865,865.40x = 1,297,923.30 × 392,890.20
  4. Step 4: Simplify right side
    865,865.40x = 509,941,344,921.66
  5. Step 5: Solve for x
    x = 509,941,344,921.66/865,865.40
  6. Step 6: Final answer
    x = 588,938.36

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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.