Home / 1,575.12-2,358.48-1,390.56

Finding the Fourth Proportional to 1,575.12, 2,358.48 and 1,390.56

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Solution

The fourth proportional to 1,575.12, 2,358.48 and 1,390.56 is: 2,082.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.12 : 2,358.48 = 1,390.56 : x
  2. Step 2: Convert to fraction form
    1,575.12/2,358.48 = 1,390.56/x
  3. Step 3: Cross multiply
    1,575.12x = 2,358.48 × 1,390.56
  4. Step 4: Simplify right side
    1,575.12x = 3,279,607.95
  5. Step 5: Solve for x
    x = 3,279,607.95/1,575.12
  6. Step 6: Final answer
    x = 2,082.13

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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.