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Finding the Fourth Proportional to 740.04, 1,103.34 and 685.32

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Solution

The fourth proportional to 740.04, 1,103.34 and 685.32 is: 1,021.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.04 : 1,103.34 = 685.32 : x
  2. Step 2: Convert to fraction form
    740.04/1,103.34 = 685.32/x
  3. Step 3: Cross multiply
    740.04x = 1,103.34 × 685.32
  4. Step 4: Simplify right side
    740.04x = 756,140.97
  5. Step 5: Solve for x
    x = 756,140.97/740.04
  6. Step 6: Final answer
    x = 1,021.76

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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.