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Finding the Fourth Proportional to 289,600.20, 434,400.30 and 279,923.40

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Solution

The fourth proportional to 289,600.20, 434,400.30 and 279,923.40 is: 419,885.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,600.20 : 434,400.30 = 279,923.40 : x
  2. Step 2: Convert to fraction form
    289,600.20/434,400.30 = 279,923.40/x
  3. Step 3: Cross multiply
    289,600.20x = 434,400.30 × 279,923.40
  4. Step 4: Simplify right side
    289,600.20x = 121,598,808,937.02
  5. Step 5: Solve for x
    x = 121,598,808,937.02/289,600.20
  6. Step 6: Final answer
    x = 419,885.10

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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.