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Finding the Fourth Proportional to 279,019.24, 418,465.74 and 79,335.28

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Solution

The fourth proportional to 279,019.24, 418,465.74 and 79,335.28 is: 118,984.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,019.24 : 418,465.74 = 79,335.28 : x
  2. Step 2: Convert to fraction form
    279,019.24/418,465.74 = 79,335.28/x
  3. Step 3: Cross multiply
    279,019.24x = 418,465.74 × 79,335.28
  4. Step 4: Simplify right side
    279,019.24x = 33,199,096,653.31
  5. Step 5: Solve for x
    x = 33,199,096,653.31/279,019.24
  6. Step 6: Final answer
    x = 118,984.97

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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.