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Finding the Fourth Proportional to 278,278.40, 417,318.40 and 100,739.36

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Solution

The fourth proportional to 278,278.40, 417,318.40 and 100,739.36 is: 151,073.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,278.40 : 417,318.40 = 100,739.36 : x
  2. Step 2: Convert to fraction form
    278,278.40/417,318.40 = 100,739.36/x
  3. Step 3: Cross multiply
    278,278.40x = 417,318.40 × 100,739.36
  4. Step 4: Simplify right side
    278,278.40x = 42,040,388,532.22
  5. Step 5: Solve for x
    x = 42,040,388,532.22/278,278.40
  6. Step 6: Final answer
    x = 151,073.13

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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.