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Finding the Fourth Proportional to 639.32, 962.55 and 562.77

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Solution

The fourth proportional to 639.32, 962.55 and 562.77 is: 847.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.32 : 962.55 = 562.77 : x
  2. Step 2: Convert to fraction form
    639.32/962.55 = 562.77/x
  3. Step 3: Cross multiply
    639.32x = 962.55 × 562.77
  4. Step 4: Simplify right side
    639.32x = 541,694.26
  5. Step 5: Solve for x
    x = 541,694.26/639.32
  6. Step 6: Final answer
    x = 847.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.