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Finding the Fourth Proportional to 1,112.67, 1,535.10 and 719.91

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Solution

The fourth proportional to 1,112.67, 1,535.10 and 719.91 is: 993.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.67 : 1,535.10 = 719.91 : x
  2. Step 2: Convert to fraction form
    1,112.67/1,535.10 = 719.91/x
  3. Step 3: Cross multiply
    1,112.67x = 1,535.10 × 719.91
  4. Step 4: Simplify right side
    1,112.67x = 1,105,133.84
  5. Step 5: Solve for x
    x = 1,105,133.84/1,112.67
  6. Step 6: Final answer
    x = 993.23

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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.