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Finding the Fourth Proportional to 1,417.41, 2,126.16 and 636.57

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Solution

The fourth proportional to 1,417.41, 2,126.16 and 636.57 is: 954.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.41 : 2,126.16 = 636.57 : x
  2. Step 2: Convert to fraction form
    1,417.41/2,126.16 = 636.57/x
  3. Step 3: Cross multiply
    1,417.41x = 2,126.16 × 636.57
  4. Step 4: Simplify right side
    1,417.41x = 1,353,449.67
  5. Step 5: Solve for x
    x = 1,353,449.67/1,417.41
  6. Step 6: Final answer
    x = 954.88

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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.