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Finding the Fourth Proportional to 719,039.68, 992,274 and 396,749.76

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Solution

The fourth proportional to 719,039.68, 992,274 and 396,749.76 is: 547,514.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,039.68 : 992,274 = 396,749.76 : x
  2. Step 2: Convert to fraction form
    719,039.68/992,274 = 396,749.76/x
  3. Step 3: Cross multiply
    719,039.68x = 992,274 × 396,749.76
  4. Step 4: Simplify right side
    719,039.68x = 393,684,471,354.24
  5. Step 5: Solve for x
    x = 393,684,471,354.24/719,039.68
  6. Step 6: Final answer
    x = 547,514.25

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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.