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Finding the Fourth Proportional to 305,557.20, 458,335.80 and 288,061.20

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Solution

The fourth proportional to 305,557.20, 458,335.80 and 288,061.20 is: 432,091.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,557.20 : 458,335.80 = 288,061.20 : x
  2. Step 2: Convert to fraction form
    305,557.20/458,335.80 = 288,061.20/x
  3. Step 3: Cross multiply
    305,557.20x = 458,335.80 × 288,061.20
  4. Step 4: Simplify right side
    305,557.20x = 132,028,760,550.96
  5. Step 5: Solve for x
    x = 132,028,760,550.96/305,557.20
  6. Step 6: Final answer
    x = 432,091.80

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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.