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Finding the Fourth Proportional to 311,359.40, 467,039.40 and 86,720.30

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Solution

The fourth proportional to 311,359.40, 467,039.40 and 86,720.30 is: 130,080.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,359.40 : 467,039.40 = 86,720.30 : x
  2. Step 2: Convert to fraction form
    311,359.40/467,039.40 = 86,720.30/x
  3. Step 3: Cross multiply
    311,359.40x = 467,039.40 × 86,720.30
  4. Step 4: Simplify right side
    311,359.40x = 40,501,796,879.82
  5. Step 5: Solve for x
    x = 40,501,796,879.82/311,359.40
  6. Step 6: Final answer
    x = 130,080.53

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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.