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Finding the Fourth Proportional to 639.18, 882.16 and 373.70

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Solution

The fourth proportional to 639.18, 882.16 and 373.70 is: 515.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.18 : 882.16 = 373.70 : x
  2. Step 2: Convert to fraction form
    639.18/882.16 = 373.70/x
  3. Step 3: Cross multiply
    639.18x = 882.16 × 373.70
  4. Step 4: Simplify right side
    639.18x = 329,661.32
  5. Step 5: Solve for x
    x = 329,661.32/639.18
  6. Step 6: Final answer
    x = 515.76

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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.