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Finding the Fourth Proportional to 661.96, 988.58 and 532.15

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Solution

The fourth proportional to 661.96, 988.58 and 532.15 is: 794.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.96 : 988.58 = 532.15 : x
  2. Step 2: Convert to fraction form
    661.96/988.58 = 532.15/x
  3. Step 3: Cross multiply
    661.96x = 988.58 × 532.15
  4. Step 4: Simplify right side
    661.96x = 526,072.85
  5. Step 5: Solve for x
    x = 526,072.85/661.96
  6. Step 6: Final answer
    x = 794.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.