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Finding the Fourth Proportional to 1,591.17, 2,386.77 and 495.54

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Solution

The fourth proportional to 1,591.17, 2,386.77 and 495.54 is: 743.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.17 : 2,386.77 = 495.54 : x
  2. Step 2: Convert to fraction form
    1,591.17/2,386.77 = 495.54/x
  3. Step 3: Cross multiply
    1,591.17x = 2,386.77 × 495.54
  4. Step 4: Simplify right side
    1,591.17x = 1,182,740.01
  5. Step 5: Solve for x
    x = 1,182,740.01/1,591.17
  6. Step 6: Final answer
    x = 743.31

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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.