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Finding the Fourth Proportional to 1,079.02, 1,489.05 and 613.30

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Solution

The fourth proportional to 1,079.02, 1,489.05 and 613.30 is: 846.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.02 : 1,489.05 = 613.30 : x
  2. Step 2: Convert to fraction form
    1,079.02/1,489.05 = 613.30/x
  3. Step 3: Cross multiply
    1,079.02x = 1,489.05 × 613.30
  4. Step 4: Simplify right side
    1,079.02x = 913,234.37
  5. Step 5: Solve for x
    x = 913,234.37/1,079.02
  6. Step 6: Final answer
    x = 846.36

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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.