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Finding the Fourth Proportional to 621.59, 931.57 and 552.47

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Solution

The fourth proportional to 621.59, 931.57 and 552.47 is: 827.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.59 : 931.57 = 552.47 : x
  2. Step 2: Convert to fraction form
    621.59/931.57 = 552.47/x
  3. Step 3: Cross multiply
    621.59x = 931.57 × 552.47
  4. Step 4: Simplify right side
    621.59x = 514,658.44
  5. Step 5: Solve for x
    x = 514,658.44/621.59
  6. Step 6: Final answer
    x = 827.98

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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.