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Finding the Fourth Proportional to 539,791.20, 808,390.80 and 289,922.40

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Solution

The fourth proportional to 539,791.20, 808,390.80 and 289,922.40 is: 434,187.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,791.20 : 808,390.80 = 289,922.40 : x
  2. Step 2: Convert to fraction form
    539,791.20/808,390.80 = 289,922.40/x
  3. Step 3: Cross multiply
    539,791.20x = 808,390.80 × 289,922.40
  4. Step 4: Simplify right side
    539,791.20x = 234,370,600,873.92
  5. Step 5: Solve for x
    x = 234,370,600,873.92/539,791.20
  6. Step 6: Final answer
    x = 434,187.52

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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.