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Finding the Fourth Proportional to 719.83, 992.80 and 543.38

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Solution

The fourth proportional to 719.83, 992.80 and 543.38 is: 749.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.83 : 992.80 = 543.38 : x
  2. Step 2: Convert to fraction form
    719.83/992.80 = 543.38/x
  3. Step 3: Cross multiply
    719.83x = 992.80 × 543.38
  4. Step 4: Simplify right side
    719.83x = 539,464.95
  5. Step 5: Solve for x
    x = 539,464.95/719.83
  6. Step 6: Final answer
    x = 749.44

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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.