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Finding the Fourth Proportional to 874,138.40, 1,311,250.80 and 454,234.40

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Solution

The fourth proportional to 874,138.40, 1,311,250.80 and 454,234.40 is: 681,374.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,138.40 : 1,311,250.80 = 454,234.40 : x
  2. Step 2: Convert to fraction form
    874,138.40/1,311,250.80 = 454,234.40/x
  3. Step 3: Cross multiply
    874,138.40x = 1,311,250.80 × 454,234.40
  4. Step 4: Simplify right side
    874,138.40x = 595,615,220,387.52
  5. Step 5: Solve for x
    x = 595,615,220,387.52/874,138.40
  6. Step 6: Final answer
    x = 681,374.05

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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.