Home / 1,242.28-1,861.50-472.36

Finding the Fourth Proportional to 1,242.28, 1,861.50 and 472.36

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Solution

The fourth proportional to 1,242.28, 1,861.50 and 472.36 is: 707.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.28 : 1,861.50 = 472.36 : x
  2. Step 2: Convert to fraction form
    1,242.28/1,861.50 = 472.36/x
  3. Step 3: Cross multiply
    1,242.28x = 1,861.50 × 472.36
  4. Step 4: Simplify right side
    1,242.28x = 879,298.14
  5. Step 5: Solve for x
    x = 879,298.14/1,242.28
  6. Step 6: Final answer
    x = 707.81

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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.