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Finding the Fourth Proportional to 311,443.40, 467,165.10 and 153,979.40

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Solution

The fourth proportional to 311,443.40, 467,165.10 and 153,979.40 is: 230,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,443.40 : 467,165.10 = 153,979.40 : x
  2. Step 2: Convert to fraction form
    311,443.40/467,165.10 = 153,979.40/x
  3. Step 3: Cross multiply
    311,443.40x = 467,165.10 × 153,979.40
  4. Step 4: Simplify right side
    311,443.40x = 71,933,801,798.94
  5. Step 5: Solve for x
    x = 71,933,801,798.94/311,443.40
  6. Step 6: Final answer
    x = 230,969.10

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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.