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Finding the Fourth Proportional to 1,079.32, 1,489.53 and 607.25

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Solution

The fourth proportional to 1,079.32, 1,489.53 and 607.25 is: 838.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.32 : 1,489.53 = 607.25 : x
  2. Step 2: Convert to fraction form
    1,079.32/1,489.53 = 607.25/x
  3. Step 3: Cross multiply
    1,079.32x = 1,489.53 × 607.25
  4. Step 4: Simplify right side
    1,079.32x = 904,517.09
  5. Step 5: Solve for x
    x = 904,517.09/1,079.32
  6. Step 6: Final answer
    x = 838.04

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1.5x scale

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.