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Finding the Fourth Proportional to 740.37, 1,110.57 and 278.26

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Solution

The fourth proportional to 740.37, 1,110.57 and 278.26 is: 417.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.37 : 1,110.57 = 278.26 : x
  2. Step 2: Convert to fraction form
    740.37/1,110.57 = 278.26/x
  3. Step 3: Cross multiply
    740.37x = 1,110.57 × 278.26
  4. Step 4: Simplify right side
    740.37x = 309,023.39
  5. Step 5: Solve for x
    x = 309,023.39/740.37
  6. Step 6: Final answer
    x = 417.39

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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.