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Finding the Fourth Proportional to 1,475.44, 2,211.38 and 652.78

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Solution

The fourth proportional to 1,475.44, 2,211.38 and 652.78 is: 978.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.44 : 2,211.38 = 652.78 : x
  2. Step 2: Convert to fraction form
    1,475.44/2,211.38 = 652.78/x
  3. Step 3: Cross multiply
    1,475.44x = 2,211.38 × 652.78
  4. Step 4: Simplify right side
    1,475.44x = 1,443,544.64
  5. Step 5: Solve for x
    x = 1,443,544.64/1,475.44
  6. Step 6: Final answer
    x = 978.38

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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.