Home / 1,572.18-2,169.50-1,199.40

Finding the Fourth Proportional to 1,572.18, 2,169.50 and 1,199.40

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Solution

The fourth proportional to 1,572.18, 2,169.50 and 1,199.40 is: 1,655.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.18 : 2,169.50 = 1,199.40 : x
  2. Step 2: Convert to fraction form
    1,572.18/2,169.50 = 1,199.40/x
  3. Step 3: Cross multiply
    1,572.18x = 2,169.50 × 1,199.40
  4. Step 4: Simplify right side
    1,572.18x = 2,602,098.30
  5. Step 5: Solve for x
    x = 2,602,098.30/1,572.18
  6. Step 6: Final answer
    x = 1,655.09

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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.