Home / 1,240.66-1,712.37-1,121.32

Finding the Fourth Proportional to 1,240.66, 1,712.37 and 1,121.32

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Solution

The fourth proportional to 1,240.66, 1,712.37 and 1,121.32 is: 1,547.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.66 : 1,712.37 = 1,121.32 : x
  2. Step 2: Convert to fraction form
    1,240.66/1,712.37 = 1,121.32/x
  3. Step 3: Cross multiply
    1,240.66x = 1,712.37 × 1,121.32
  4. Step 4: Simplify right side
    1,240.66x = 1,920,114.73
  5. Step 5: Solve for x
    x = 1,920,114.73/1,240.66
  6. Step 6: Final answer
    x = 1,547.66

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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.