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Finding the Fourth Proportional to 1,384.90, 2,076.56 and 460.20

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Solution

The fourth proportional to 1,384.90, 2,076.56 and 460.20 is: 690.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.90 : 2,076.56 = 460.20 : x
  2. Step 2: Convert to fraction form
    1,384.90/2,076.56 = 460.20/x
  3. Step 3: Cross multiply
    1,384.90x = 2,076.56 × 460.20
  4. Step 4: Simplify right side
    1,384.90x = 955,632.91
  5. Step 5: Solve for x
    x = 955,632.91/1,384.90
  6. Step 6: Final answer
    x = 690.04

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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.