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Finding the Fourth Proportional to 1,154.81, 1,731.30 and 423.98

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Solution

The fourth proportional to 1,154.81, 1,731.30 and 423.98 is: 635.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.81 : 1,731.30 = 423.98 : x
  2. Step 2: Convert to fraction form
    1,154.81/1,731.30 = 423.98/x
  3. Step 3: Cross multiply
    1,154.81x = 1,731.30 × 423.98
  4. Step 4: Simplify right side
    1,154.81x = 734,043.75
  5. Step 5: Solve for x
    x = 734,043.75/1,154.81
  6. Step 6: Final answer
    x = 635.64

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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.