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Finding the Fourth Proportional to 711.55, 981.87 and 525.14

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Solution

The fourth proportional to 711.55, 981.87 and 525.14 is: 724.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.55 : 981.87 = 525.14 : x
  2. Step 2: Convert to fraction form
    711.55/981.87 = 525.14/x
  3. Step 3: Cross multiply
    711.55x = 981.87 × 525.14
  4. Step 4: Simplify right side
    711.55x = 515,619.21
  5. Step 5: Solve for x
    x = 515,619.21/711.55
  6. Step 6: Final answer
    x = 724.64

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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.