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Finding the Fourth Proportional to 1,014.64, 1,400.50 and 636.72

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Solution

The fourth proportional to 1,014.64, 1,400.50 and 636.72 is: 878.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.64 : 1,400.50 = 636.72 : x
  2. Step 2: Convert to fraction form
    1,014.64/1,400.50 = 636.72/x
  3. Step 3: Cross multiply
    1,014.64x = 1,400.50 × 636.72
  4. Step 4: Simplify right side
    1,014.64x = 891,726.36
  5. Step 5: Solve for x
    x = 891,726.36/1,014.64
  6. Step 6: Final answer
    x = 878.86

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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.