Home / 1,572.13-2,169.23-900.14

Finding the Fourth Proportional to 1,572.13, 2,169.23 and 900.14

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Solution

The fourth proportional to 1,572.13, 2,169.23 and 900.14 is: 1,242.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.13 : 2,169.23 = 900.14 : x
  2. Step 2: Convert to fraction form
    1,572.13/2,169.23 = 900.14/x
  3. Step 3: Cross multiply
    1,572.13x = 2,169.23 × 900.14
  4. Step 4: Simplify right side
    1,572.13x = 1,952,606.86
  5. Step 5: Solve for x
    x = 1,952,606.86/1,572.13
  6. Step 6: Final answer
    x = 1,242.02

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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.