Home / 1,121.17-1,547.36-679.08

Finding the Fourth Proportional to 1,121.17, 1,547.36 and 679.08

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Solution

The fourth proportional to 1,121.17, 1,547.36 and 679.08 is: 937.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.17 : 1,547.36 = 679.08 : x
  2. Step 2: Convert to fraction form
    1,121.17/1,547.36 = 679.08/x
  3. Step 3: Cross multiply
    1,121.17x = 1,547.36 × 679.08
  4. Step 4: Simplify right side
    1,121.17x = 1,050,781.23
  5. Step 5: Solve for x
    x = 1,050,781.23/1,121.17
  6. Step 6: Final answer
    x = 937.22

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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.