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Finding the Fourth Proportional to 1,591.39, 2,387.69 and 618.17

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Solution

The fourth proportional to 1,591.39, 2,387.69 and 618.17 is: 927.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.39 : 2,387.69 = 618.17 : x
  2. Step 2: Convert to fraction form
    1,591.39/2,387.69 = 618.17/x
  3. Step 3: Cross multiply
    1,591.39x = 2,387.69 × 618.17
  4. Step 4: Simplify right side
    1,591.39x = 1,475,995.24
  5. Step 5: Solve for x
    x = 1,475,995.24/1,591.39
  6. Step 6: Final answer
    x = 927.49

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1.5x scale

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.