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Finding the Fourth Proportional to 875.34, 1,312.92 and 586.17

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Solution

The fourth proportional to 875.34, 1,312.92 and 586.17 is: 879.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.34 : 1,312.92 = 586.17 : x
  2. Step 2: Convert to fraction form
    875.34/1,312.92 = 586.17/x
  3. Step 3: Cross multiply
    875.34x = 1,312.92 × 586.17
  4. Step 4: Simplify right side
    875.34x = 769,594.32
  5. Step 5: Solve for x
    x = 769,594.32/875.34
  6. Step 6: Final answer
    x = 879.19

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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.