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Finding the Fourth Proportional to 860,761.80, 1,291,300.31 and 355,046.90

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Solution

The fourth proportional to 860,761.80, 1,291,300.31 and 355,046.90 is: 532,635.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,761.80 : 1,291,300.31 = 355,046.90 : x
  2. Step 2: Convert to fraction form
    860,761.80/1,291,300.31 = 355,046.90/x
  3. Step 3: Cross multiply
    860,761.80x = 1,291,300.31 × 355,046.90
  4. Step 4: Simplify right side
    860,761.80x = 458,472,165,578.04
  5. Step 5: Solve for x
    x = 458,472,165,578.04/860,761.80
  6. Step 6: Final answer
    x = 532,635.35

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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.