Home / 1,575.28-2,172.68-977.44

Finding the Fourth Proportional to 1,575.28, 2,172.68 and 977.44

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Solution

The fourth proportional to 1,575.28, 2,172.68 and 977.44 is: 1,348.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.28 : 2,172.68 = 977.44 : x
  2. Step 2: Convert to fraction form
    1,575.28/2,172.68 = 977.44/x
  3. Step 3: Cross multiply
    1,575.28x = 2,172.68 × 977.44
  4. Step 4: Simplify right side
    1,575.28x = 2,123,664.34
  5. Step 5: Solve for x
    x = 2,123,664.34/1,575.28
  6. Step 6: Final answer
    x = 1,348.12

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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.