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Finding the Fourth Proportional to 1,384.55, 2,076.57 and 410.42

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Solution

The fourth proportional to 1,384.55, 2,076.57 and 410.42 is: 615.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.55 : 2,076.57 = 410.42 : x
  2. Step 2: Convert to fraction form
    1,384.55/2,076.57 = 410.42/x
  3. Step 3: Cross multiply
    1,384.55x = 2,076.57 × 410.42
  4. Step 4: Simplify right side
    1,384.55x = 852,265.86
  5. Step 5: Solve for x
    x = 852,265.86/1,384.55
  6. Step 6: Final answer
    x = 615.55

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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.