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Finding the Fourth Proportional to 398,426.70, 597,640.05 and 149,076.30

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Solution

The fourth proportional to 398,426.70, 597,640.05 and 149,076.30 is: 223,614.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,426.70 : 597,640.05 = 149,076.30 : x
  2. Step 2: Convert to fraction form
    398,426.70/597,640.05 = 149,076.30/x
  3. Step 3: Cross multiply
    398,426.70x = 597,640.05 × 149,076.30
  4. Step 4: Simplify right side
    398,426.70x = 89,093,967,385.82
  5. Step 5: Solve for x
    x = 89,093,967,385.82/398,426.70
  6. Step 6: Final answer
    x = 223,614.45

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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.