Home / 1,242.54-1,865.34-1,140.66

Finding the Fourth Proportional to 1,242.54, 1,865.34 and 1,140.66

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Solution

The fourth proportional to 1,242.54, 1,865.34 and 1,140.66 is: 1,712.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.54 : 1,865.34 = 1,140.66 : x
  2. Step 2: Convert to fraction form
    1,242.54/1,865.34 = 1,140.66/x
  3. Step 3: Cross multiply
    1,242.54x = 1,865.34 × 1,140.66
  4. Step 4: Simplify right side
    1,242.54x = 2,127,718.72
  5. Step 5: Solve for x
    x = 2,127,718.72/1,242.54
  6. Step 6: Final answer
    x = 1,712.39

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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.