Home / 1,116.16-1,539.36-717.89

Finding the Fourth Proportional to 1,116.16, 1,539.36 and 717.89

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Solution

The fourth proportional to 1,116.16, 1,539.36 and 717.89 is: 990.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.16 : 1,539.36 = 717.89 : x
  2. Step 2: Convert to fraction form
    1,116.16/1,539.36 = 717.89/x
  3. Step 3: Cross multiply
    1,116.16x = 1,539.36 × 717.89
  4. Step 4: Simplify right side
    1,116.16x = 1,105,083.45
  5. Step 5: Solve for x
    x = 1,105,083.45/1,116.16
  6. Step 6: Final answer
    x = 990.08

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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.