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Finding the Fourth Proportional to 877.64, 1,314.72 and 531.04

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Solution

The fourth proportional to 877.64, 1,314.72 and 531.04 is: 795.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.64 : 1,314.72 = 531.04 : x
  2. Step 2: Convert to fraction form
    877.64/1,314.72 = 531.04/x
  3. Step 3: Cross multiply
    877.64x = 1,314.72 × 531.04
  4. Step 4: Simplify right side
    877.64x = 698,168.91
  5. Step 5: Solve for x
    x = 698,168.91/877.64
  6. Step 6: Final answer
    x = 795.51

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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.