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Finding the Fourth Proportional to 1,464.64, 2,020.56 and 874.88

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Solution

The fourth proportional to 1,464.64, 2,020.56 and 874.88 is: 1,206.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,464.64 : 2,020.56 = 874.88 : x
  2. Step 2: Convert to fraction form
    1,464.64/2,020.56 = 874.88/x
  3. Step 3: Cross multiply
    1,464.64x = 2,020.56 × 874.88
  4. Step 4: Simplify right side
    1,464.64x = 1,767,747.53
  5. Step 5: Solve for x
    x = 1,767,747.53/1,464.64
  6. Step 6: Final answer
    x = 1,206.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.