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Finding the Fourth Proportional to 750.15, 1,119.50 and 668.14

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Solution

The fourth proportional to 750.15, 1,119.50 and 668.14 is: 997.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.15 : 1,119.50 = 668.14 : x
  2. Step 2: Convert to fraction form
    750.15/1,119.50 = 668.14/x
  3. Step 3: Cross multiply
    750.15x = 1,119.50 × 668.14
  4. Step 4: Simplify right side
    750.15x = 747,973.79
  5. Step 5: Solve for x
    x = 747,973.79/750.15
  6. Step 6: Final answer
    x = 997.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.