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Finding the Fourth Proportional to 514.60, 710.13 and 281.71

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Solution

The fourth proportional to 514.60, 710.13 and 281.71 is: 388.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.60 : 710.13 = 281.71 : x
  2. Step 2: Convert to fraction form
    514.60/710.13 = 281.71/x
  3. Step 3: Cross multiply
    514.60x = 710.13 × 281.71
  4. Step 4: Simplify right side
    514.60x = 200,050.72
  5. Step 5: Solve for x
    x = 200,050.72/514.60
  6. Step 6: Final answer
    x = 388.75

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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.