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Finding the Fourth Proportional to 889.12, 1,330.80 and 614.08

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Solution

The fourth proportional to 889.12, 1,330.80 and 614.08 is: 919.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.12 : 1,330.80 = 614.08 : x
  2. Step 2: Convert to fraction form
    889.12/1,330.80 = 614.08/x
  3. Step 3: Cross multiply
    889.12x = 1,330.80 × 614.08
  4. Step 4: Simplify right side
    889.12x = 817,217.66
  5. Step 5: Solve for x
    x = 817,217.66/889.12
  6. Step 6: Final answer
    x = 919.13

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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.