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Finding the Fourth Proportional to 289,601.20, 434,401.80 and 279,924.40

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Solution

The fourth proportional to 289,601.20, 434,401.80 and 279,924.40 is: 419,886.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,601.20 : 434,401.80 = 279,924.40 : x
  2. Step 2: Convert to fraction form
    289,601.20/434,401.80 = 279,924.40/x
  3. Step 3: Cross multiply
    289,601.20x = 434,401.80 × 279,924.40
  4. Step 4: Simplify right side
    289,601.20x = 121,599,663,223.92
  5. Step 5: Solve for x
    x = 121,599,663,223.92/289,601.20
  6. Step 6: Final answer
    x = 419,886.60

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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.