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Finding the Fourth Proportional to 1,080.02, 1,490.28 and 614.28

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Solution

The fourth proportional to 1,080.02, 1,490.28 and 614.28 is: 847.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.02 : 1,490.28 = 614.28 : x
  2. Step 2: Convert to fraction form
    1,080.02/1,490.28 = 614.28/x
  3. Step 3: Cross multiply
    1,080.02x = 1,490.28 × 614.28
  4. Step 4: Simplify right side
    1,080.02x = 915,449.20
  5. Step 5: Solve for x
    x = 915,449.20/1,080.02
  6. Step 6: Final answer
    x = 847.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.