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Finding the Fourth Proportional to 639.96, 882.05 and 587.71

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Solution

The fourth proportional to 639.96, 882.05 and 587.71 is: 810.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.96 : 882.05 = 587.71 : x
  2. Step 2: Convert to fraction form
    639.96/882.05 = 587.71/x
  3. Step 3: Cross multiply
    639.96x = 882.05 × 587.71
  4. Step 4: Simplify right side
    639.96x = 518,389.61
  5. Step 5: Solve for x
    x = 518,389.61/639.96
  6. Step 6: Final answer
    x = 810.03

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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.