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Finding the Fourth Proportional to 407,542.40, 611,340.60 and 108,018.80

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Solution

The fourth proportional to 407,542.40, 611,340.60 and 108,018.80 is: 162,035.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,542.40 : 611,340.60 = 108,018.80 : x
  2. Step 2: Convert to fraction form
    407,542.40/611,340.60 = 108,018.80/x
  3. Step 3: Cross multiply
    407,542.40x = 611,340.60 × 108,018.80
  4. Step 4: Simplify right side
    407,542.40x = 66,036,278,003.28
  5. Step 5: Solve for x
    x = 66,036,278,003.28/407,542.40
  6. Step 6: Final answer
    x = 162,035.36

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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.