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Finding the Fourth Proportional to 326,502.20, 489,826.20 and 255,643.40

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Solution

The fourth proportional to 326,502.20, 489,826.20 and 255,643.40 is: 383,522.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,502.20 : 489,826.20 = 255,643.40 : x
  2. Step 2: Convert to fraction form
    326,502.20/489,826.20 = 255,643.40/x
  3. Step 3: Cross multiply
    326,502.20x = 489,826.20 × 255,643.40
  4. Step 4: Simplify right side
    326,502.20x = 125,220,835,177.08
  5. Step 5: Solve for x
    x = 125,220,835,177.08/326,502.20
  6. Step 6: Final answer
    x = 383,522.18

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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.