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Finding the Fourth Proportional to 621.32, 858.12 and 424.52

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Solution

The fourth proportional to 621.32, 858.12 and 424.52 is: 586.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.32 : 858.12 = 424.52 : x
  2. Step 2: Convert to fraction form
    621.32/858.12 = 424.52/x
  3. Step 3: Cross multiply
    621.32x = 858.12 × 424.52
  4. Step 4: Simplify right side
    621.32x = 364,289.10
  5. Step 5: Solve for x
    x = 364,289.10/621.32
  6. Step 6: Final answer
    x = 586.31

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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.