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Finding the Fourth Proportional to 1,384.64, 2,076.92 and 410.76

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Solution

The fourth proportional to 1,384.64, 2,076.92 and 410.76 is: 616.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.64 : 2,076.92 = 410.76 : x
  2. Step 2: Convert to fraction form
    1,384.64/2,076.92 = 410.76/x
  3. Step 3: Cross multiply
    1,384.64x = 2,076.92 × 410.76
  4. Step 4: Simplify right side
    1,384.64x = 853,115.66
  5. Step 5: Solve for x
    x = 853,115.66/1,384.64
  6. Step 6: Final answer
    x = 616.13

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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.