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Finding the Fourth Proportional to 279,364.48, 418,977.29 and 79,686.59

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Solution

The fourth proportional to 279,364.48, 418,977.29 and 79,686.59 is: 119,510.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,364.48 : 418,977.29 = 79,686.59 : x
  2. Step 2: Convert to fraction form
    279,364.48/418,977.29 = 79,686.59/x
  3. Step 3: Cross multiply
    279,364.48x = 418,977.29 × 79,686.59
  4. Step 4: Simplify right side
    279,364.48x = 33,386,869,631.87
  5. Step 5: Solve for x
    x = 33,386,869,631.87/279,364.48
  6. Step 6: Final answer
    x = 119,510.07

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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.