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Finding the Fourth Proportional to 278,889.30, 418,333.95 and 259,206.30

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Solution

The fourth proportional to 278,889.30, 418,333.95 and 259,206.30 is: 388,809.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,889.30 : 418,333.95 = 259,206.30 : x
  2. Step 2: Convert to fraction form
    278,889.30/418,333.95 = 259,206.30/x
  3. Step 3: Cross multiply
    278,889.30x = 418,333.95 × 259,206.30
  4. Step 4: Simplify right side
    278,889.30x = 108,434,795,343.89
  5. Step 5: Solve for x
    x = 108,434,795,343.89/278,889.30
  6. Step 6: Final answer
    x = 388,809.45

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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.