Home / 1,575.18-2,172.56-1,043.12

Finding the Fourth Proportional to 1,575.18, 2,172.56 and 1,043.12

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Solution

The fourth proportional to 1,575.18, 2,172.56 and 1,043.12 is: 1,438.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.18 : 2,172.56 = 1,043.12 : x
  2. Step 2: Convert to fraction form
    1,575.18/2,172.56 = 1,043.12/x
  3. Step 3: Cross multiply
    1,575.18x = 2,172.56 × 1,043.12
  4. Step 4: Simplify right side
    1,575.18x = 2,266,240.79
  5. Step 5: Solve for x
    x = 2,266,240.79/1,575.18
  6. Step 6: Final answer
    x = 1,438.72

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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.