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Finding the Fourth Proportional to 279,217.53, 418,820.90 and 79,539.21

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Solution

The fourth proportional to 279,217.53, 418,820.90 and 79,539.21 is: 119,307.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,217.53 : 418,820.90 = 79,539.21 : x
  2. Step 2: Convert to fraction form
    279,217.53/418,820.90 = 79,539.21/x
  3. Step 3: Cross multiply
    279,217.53x = 418,820.90 × 79,539.21
  4. Step 4: Simplify right side
    279,217.53x = 33,312,683,119.79
  5. Step 5: Solve for x
    x = 33,312,683,119.79/279,217.53
  6. Step 6: Final answer
    x = 119,307.28

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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.