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Finding the Fourth Proportional to 1,041.68, 1,436.72 and 668.70

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Solution

The fourth proportional to 1,041.68, 1,436.72 and 668.70 is: 922.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.68 : 1,436.72 = 668.70 : x
  2. Step 2: Convert to fraction form
    1,041.68/1,436.72 = 668.70/x
  3. Step 3: Cross multiply
    1,041.68x = 1,436.72 × 668.70
  4. Step 4: Simplify right side
    1,041.68x = 960,731.32
  5. Step 5: Solve for x
    x = 960,731.32/1,041.68
  6. Step 6: Final answer
    x = 922.29

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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.