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Finding the Fourth Proportional to 1,417.74, 2,124.63 and 636.72

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Solution

The fourth proportional to 1,417.74, 2,124.63 and 636.72 is: 954.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.74 : 2,124.63 = 636.72 : x
  2. Step 2: Convert to fraction form
    1,417.74/2,124.63 = 636.72/x
  3. Step 3: Cross multiply
    1,417.74x = 2,124.63 × 636.72
  4. Step 4: Simplify right side
    1,417.74x = 1,352,794.41
  5. Step 5: Solve for x
    x = 1,352,794.41/1,417.74
  6. Step 6: Final answer
    x = 954.19

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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.