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Finding the Fourth Proportional to 1,438.47, 2,158.02 and 464.54

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Solution

The fourth proportional to 1,438.47, 2,158.02 and 464.54 is: 696.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.47 : 2,158.02 = 464.54 : x
  2. Step 2: Convert to fraction form
    1,438.47/2,158.02 = 464.54/x
  3. Step 3: Cross multiply
    1,438.47x = 2,158.02 × 464.54
  4. Step 4: Simplify right side
    1,438.47x = 1,002,475.82
  5. Step 5: Solve for x
    x = 1,002,475.82/1,438.47
  6. Step 6: Final answer
    x = 696.90

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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.