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Finding the Fourth Proportional to 279,165.80, 418,748.70 and 266,335.40

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Solution

The fourth proportional to 279,165.80, 418,748.70 and 266,335.40 is: 399,503.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,165.80 : 418,748.70 = 266,335.40 : x
  2. Step 2: Convert to fraction form
    279,165.80/418,748.70 = 266,335.40/x
  3. Step 3: Cross multiply
    279,165.80x = 418,748.70 × 266,335.40
  4. Step 4: Simplify right side
    279,165.80x = 111,527,602,513.98
  5. Step 5: Solve for x
    x = 111,527,602,513.98/279,165.80
  6. Step 6: Final answer
    x = 399,503.10

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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.