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Finding the Fourth Proportional to 1,335.09, 2,002.92 and 410.55

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Solution

The fourth proportional to 1,335.09, 2,002.92 and 410.55 is: 615.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.09 : 2,002.92 = 410.55 : x
  2. Step 2: Convert to fraction form
    1,335.09/2,002.92 = 410.55/x
  3. Step 3: Cross multiply
    1,335.09x = 2,002.92 × 410.55
  4. Step 4: Simplify right side
    1,335.09x = 822,298.81
  5. Step 5: Solve for x
    x = 822,298.81/1,335.09
  6. Step 6: Final answer
    x = 615.91

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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.