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Finding the Fourth Proportional to 747.08, 1,119.78 and 563.90

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Solution

The fourth proportional to 747.08, 1,119.78 and 563.90 is: 845.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.08 : 1,119.78 = 563.90 : x
  2. Step 2: Convert to fraction form
    747.08/1,119.78 = 563.90/x
  3. Step 3: Cross multiply
    747.08x = 1,119.78 × 563.90
  4. Step 4: Simplify right side
    747.08x = 631,443.94
  5. Step 5: Solve for x
    x = 631,443.94/747.08
  6. Step 6: Final answer
    x = 845.22

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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.