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Finding the Fourth Proportional to 1,577.88, 2,366.78 and 423.63

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Solution

The fourth proportional to 1,577.88, 2,366.78 and 423.63 is: 635.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577.88 : 2,366.78 = 423.63 : x
  2. Step 2: Convert to fraction form
    1,577.88/2,366.78 = 423.63/x
  3. Step 3: Cross multiply
    1,577.88x = 2,366.78 × 423.63
  4. Step 4: Simplify right side
    1,577.88x = 1,002,639.01
  5. Step 5: Solve for x
    x = 1,002,639.01/1,577.88
  6. Step 6: Final answer
    x = 635.43

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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.