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Finding the Fourth Proportional to 326,129.80, 489,194.70 and 302,510.20

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Solution

The fourth proportional to 326,129.80, 489,194.70 and 302,510.20 is: 453,765.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,129.80 : 489,194.70 = 302,510.20 : x
  2. Step 2: Convert to fraction form
    326,129.80/489,194.70 = 302,510.20/x
  3. Step 3: Cross multiply
    326,129.80x = 489,194.70 × 302,510.20
  4. Step 4: Simplify right side
    326,129.80x = 147,986,386,535.94
  5. Step 5: Solve for x
    x = 147,986,386,535.94/326,129.80
  6. Step 6: Final answer
    x = 453,765.30

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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.