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Finding the Fourth Proportional to 279,159.80, 418,739.70 and 266,329.40

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Solution

The fourth proportional to 279,159.80, 418,739.70 and 266,329.40 is: 399,494.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,159.80 : 418,739.70 = 266,329.40 : x
  2. Step 2: Convert to fraction form
    279,159.80/418,739.70 = 266,329.40/x
  3. Step 3: Cross multiply
    279,159.80x = 418,739.70 × 266,329.40
  4. Step 4: Simplify right side
    279,159.80x = 111,522,693,057.18
  5. Step 5: Solve for x
    x = 111,522,693,057.18/279,159.80
  6. Step 6: Final answer
    x = 399,494.10

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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.