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Finding the Fourth Proportional to 744.52, 1,117.10 and 539.32

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Solution

The fourth proportional to 744.52, 1,117.10 and 539.32 is: 809.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.52 : 1,117.10 = 539.32 : x
  2. Step 2: Convert to fraction form
    744.52/1,117.10 = 539.32/x
  3. Step 3: Cross multiply
    744.52x = 1,117.10 × 539.32
  4. Step 4: Simplify right side
    744.52x = 602,474.37
  5. Step 5: Solve for x
    x = 602,474.37/744.52
  6. Step 6: Final answer
    x = 809.21

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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.