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Finding the Fourth Proportional to 1,384.71, 2,079.42 and 925.44

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Solution

The fourth proportional to 1,384.71, 2,079.42 and 925.44 is: 1,389.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.71 : 2,079.42 = 925.44 : x
  2. Step 2: Convert to fraction form
    1,384.71/2,079.42 = 925.44/x
  3. Step 3: Cross multiply
    1,384.71x = 2,079.42 × 925.44
  4. Step 4: Simplify right side
    1,384.71x = 1,924,381.48
  5. Step 5: Solve for x
    x = 1,924,381.48/1,384.71
  6. Step 6: Final answer
    x = 1,389.73

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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.