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Finding the Fourth Proportional to 289,366.80, 434,050.20 and 239,600.40

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Solution

The fourth proportional to 289,366.80, 434,050.20 and 239,600.40 is: 359,400.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,366.80 : 434,050.20 = 239,600.40 : x
  2. Step 2: Convert to fraction form
    289,366.80/434,050.20 = 239,600.40/x
  3. Step 3: Cross multiply
    289,366.80x = 434,050.20 × 239,600.40
  4. Step 4: Simplify right side
    289,366.80x = 103,998,601,540.08
  5. Step 5: Solve for x
    x = 103,998,601,540.08/289,366.80
  6. Step 6: Final answer
    x = 359,400.60

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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.