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Finding the Fourth Proportional to 639.34, 954.68 and 507.87

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Solution

The fourth proportional to 639.34, 954.68 and 507.87 is: 758.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.34 : 954.68 = 507.87 : x
  2. Step 2: Convert to fraction form
    639.34/954.68 = 507.87/x
  3. Step 3: Cross multiply
    639.34x = 954.68 × 507.87
  4. Step 4: Simplify right side
    639.34x = 484,853.33
  5. Step 5: Solve for x
    x = 484,853.33/639.34
  6. Step 6: Final answer
    x = 758.37

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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.