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Finding the Fourth Proportional to 860.58, 1,291.35 and 532.32

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Solution

The fourth proportional to 860.58, 1,291.35 and 532.32 is: 798.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.58 : 1,291.35 = 532.32 : x
  2. Step 2: Convert to fraction form
    860.58/1,291.35 = 532.32/x
  3. Step 3: Cross multiply
    860.58x = 1,291.35 × 532.32
  4. Step 4: Simplify right side
    860.58x = 687,411.43
  5. Step 5: Solve for x
    x = 687,411.43/860.58
  6. Step 6: Final answer
    x = 798.78

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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.