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Finding the Fourth Proportional to 1,110.11, 1,532.51 and 690.60

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Solution

The fourth proportional to 1,110.11, 1,532.51 and 690.60 is: 953.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.11 : 1,532.51 = 690.60 : x
  2. Step 2: Convert to fraction form
    1,110.11/1,532.51 = 690.60/x
  3. Step 3: Cross multiply
    1,110.11x = 1,532.51 × 690.60
  4. Step 4: Simplify right side
    1,110.11x = 1,058,351.98
  5. Step 5: Solve for x
    x = 1,058,351.98/1,110.11
  6. Step 6: Final answer
    x = 953.37

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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.