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Finding the Fourth Proportional to 639.72, 957.72 and 588.69

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Solution

The fourth proportional to 639.72, 957.72 and 588.69 is: 881.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.72 : 957.72 = 588.69 : x
  2. Step 2: Convert to fraction form
    639.72/957.72 = 588.69/x
  3. Step 3: Cross multiply
    639.72x = 957.72 × 588.69
  4. Step 4: Simplify right side
    639.72x = 563,800.19
  5. Step 5: Solve for x
    x = 563,800.19/639.72
  6. Step 6: Final answer
    x = 881.32

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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.