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Finding the Fourth Proportional to 763.85, 1,054.36 and 543.44

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Solution

The fourth proportional to 763.85, 1,054.36 and 543.44 is: 750.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.85 : 1,054.36 = 543.44 : x
  2. Step 2: Convert to fraction form
    763.85/1,054.36 = 543.44/x
  3. Step 3: Cross multiply
    763.85x = 1,054.36 × 543.44
  4. Step 4: Simplify right side
    763.85x = 572,976.13
  5. Step 5: Solve for x
    x = 572,976.13/763.85
  6. Step 6: Final answer
    x = 750.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.