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Finding the Fourth Proportional to 326,257.81, 489,385.78 and 89,600.72

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Solution

The fourth proportional to 326,257.81, 489,385.78 and 89,600.72 is: 134,400.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,257.81 : 489,385.78 = 89,600.72 : x
  2. Step 2: Convert to fraction form
    326,257.81/489,385.78 = 89,600.72/x
  3. Step 3: Cross multiply
    326,257.81x = 489,385.78 × 89,600.72
  4. Step 4: Simplify right side
    326,257.81x = 43,849,315,574.83
  5. Step 5: Solve for x
    x = 43,849,315,574.83/326,257.81
  6. Step 6: Final answer
    x = 134,400.82

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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.