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Finding the Fourth Proportional to 278,450.40, 417,805.20 and 145,480.80

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Solution

The fourth proportional to 278,450.40, 417,805.20 and 145,480.80 is: 218,288.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,450.40 : 417,805.20 = 145,480.80 : x
  2. Step 2: Convert to fraction form
    278,450.40/417,805.20 = 145,480.80/x
  3. Step 3: Cross multiply
    278,450.40x = 417,805.20 × 145,480.80
  4. Step 4: Simplify right side
    278,450.40x = 60,782,634,740.16
  5. Step 5: Solve for x
    x = 60,782,634,740.16/278,450.40
  6. Step 6: Final answer
    x = 218,288.91

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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.