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Finding the Fourth Proportional to 278,880.40, 418,320.60 and 259,634.80

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Solution

The fourth proportional to 278,880.40, 418,320.60 and 259,634.80 is: 389,452.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,880.40 : 418,320.60 = 259,634.80 : x
  2. Step 2: Convert to fraction form
    278,880.40/418,320.60 = 259,634.80/x
  3. Step 3: Cross multiply
    278,880.40x = 418,320.60 × 259,634.80
  4. Step 4: Simplify right side
    278,880.40x = 108,610,585,316.88
  5. Step 5: Solve for x
    x = 108,610,585,316.88/278,880.40
  6. Step 6: Final answer
    x = 389,452.20

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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.