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Finding the Fourth Proportional to 637.14, 878.95 and 400.98

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Solution

The fourth proportional to 637.14, 878.95 and 400.98 is: 553.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.14 : 878.95 = 400.98 : x
  2. Step 2: Convert to fraction form
    637.14/878.95 = 400.98/x
  3. Step 3: Cross multiply
    637.14x = 878.95 × 400.98
  4. Step 4: Simplify right side
    637.14x = 352,445.17
  5. Step 5: Solve for x
    x = 352,445.17/637.14
  6. Step 6: Final answer
    x = 553.16

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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.