Home / 782,312.18-1,079,405.78-442,780.43

Finding the Fourth Proportional to 782,312.18, 1,079,405.78 and 442,780.43

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Solution

The fourth proportional to 782,312.18, 1,079,405.78 and 442,780.43 is: 610,932.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,312.18 : 1,079,405.78 = 442,780.43 : x
  2. Step 2: Convert to fraction form
    782,312.18/1,079,405.78 = 442,780.43/x
  3. Step 3: Cross multiply
    782,312.18x = 1,079,405.78 × 442,780.43
  4. Step 4: Simplify right side
    782,312.18x = 477,939,747,801.95
  5. Step 5: Solve for x
    x = 477,939,747,801.95/782,312.18
  6. Step 6: Final answer
    x = 610,932.26

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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.