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Finding the Fourth Proportional to 740.26, 1,110.80 and 556.39

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Solution

The fourth proportional to 740.26, 1,110.80 and 556.39 is: 834.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.26 : 1,110.80 = 556.39 : x
  2. Step 2: Convert to fraction form
    740.26/1,110.80 = 556.39/x
  3. Step 3: Cross multiply
    740.26x = 1,110.80 × 556.39
  4. Step 4: Simplify right side
    740.26x = 618,032.45
  5. Step 5: Solve for x
    x = 618,032.45/740.26
  6. Step 6: Final answer
    x = 834.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.