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Finding the Fourth Proportional to 740.35, 1,111.20 and 375.39

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Solution

The fourth proportional to 740.35, 1,111.20 and 375.39 is: 563.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.35 : 1,111.20 = 375.39 : x
  2. Step 2: Convert to fraction form
    740.35/1,111.20 = 375.39/x
  3. Step 3: Cross multiply
    740.35x = 1,111.20 × 375.39
  4. Step 4: Simplify right side
    740.35x = 417,125.94
  5. Step 5: Solve for x
    x = 417,125.94/740.35
  6. Step 6: Final answer
    x = 563.42

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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.