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Finding the Fourth Proportional to 326,089.40, 489,134.10 and 219,801.20

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Solution

The fourth proportional to 326,089.40, 489,134.10 and 219,801.20 is: 329,701.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,089.40 : 489,134.10 = 219,801.20 : x
  2. Step 2: Convert to fraction form
    326,089.40/489,134.10 = 219,801.20/x
  3. Step 3: Cross multiply
    326,089.40x = 489,134.10 × 219,801.20
  4. Step 4: Simplify right side
    326,089.40x = 107,512,262,140.92
  5. Step 5: Solve for x
    x = 107,512,262,140.92/326,089.40
  6. Step 6: Final answer
    x = 329,701.80

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1.5x scale

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.