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Finding the Fourth Proportional to 1,111.19, 1,532.93 and 718.34

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Solution

The fourth proportional to 1,111.19, 1,532.93 and 718.34 is: 990.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.19 : 1,532.93 = 718.34 : x
  2. Step 2: Convert to fraction form
    1,111.19/1,532.93 = 718.34/x
  3. Step 3: Cross multiply
    1,111.19x = 1,532.93 × 718.34
  4. Step 4: Simplify right side
    1,111.19x = 1,101,153.68
  5. Step 5: Solve for x
    x = 1,101,153.68/1,111.19
  6. Step 6: Final answer
    x = 990.97

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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.