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Finding the Fourth Proportional to 638.01, 953.37 and 558.90

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Solution

The fourth proportional to 638.01, 953.37 and 558.90 is: 835.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.01 : 953.37 = 558.90 : x
  2. Step 2: Convert to fraction form
    638.01/953.37 = 558.90/x
  3. Step 3: Cross multiply
    638.01x = 953.37 × 558.90
  4. Step 4: Simplify right side
    638.01x = 532,838.49
  5. Step 5: Solve for x
    x = 532,838.49/638.01
  6. Step 6: Final answer
    x = 835.16

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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.