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Finding the Fourth Proportional to 749, 1,122.72 and 543.06

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Solution

The fourth proportional to 749, 1,122.72 and 543.06 is: 814.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    749 : 1,122.72 = 543.06 : x
  2. Step 2: Convert to fraction form
    749/1,122.72 = 543.06/x
  3. Step 3: Cross multiply
    749x = 1,122.72 × 543.06
  4. Step 4: Simplify right side
    749x = 609,704.32
  5. Step 5: Solve for x
    x = 609,704.32/749
  6. Step 6: Final answer
    x = 814.02

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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.