Home / 1,572.11-2,169.12-1,047.79

Finding the Fourth Proportional to 1,572.11, 2,169.12 and 1,047.79

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Solution

The fourth proportional to 1,572.11, 2,169.12 and 1,047.79 is: 1,445.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.11 : 2,169.12 = 1,047.79 : x
  2. Step 2: Convert to fraction form
    1,572.11/2,169.12 = 1,047.79/x
  3. Step 3: Cross multiply
    1,572.11x = 2,169.12 × 1,047.79
  4. Step 4: Simplify right side
    1,572.11x = 2,272,777.01
  5. Step 5: Solve for x
    x = 2,272,777.01/1,572.11
  6. Step 6: Final answer
    x = 1,445.69

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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.