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Finding the Fourth Proportional to 318,730, 439,847.40 and 177,418

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Solution

The fourth proportional to 318,730, 439,847.40 and 177,418 is: 244,836.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,730 : 439,847.40 = 177,418 : x
  2. Step 2: Convert to fraction form
    318,730/439,847.40 = 177,418/x
  3. Step 3: Cross multiply
    318,730x = 439,847.40 × 177,418
  4. Step 4: Simplify right side
    318,730x = 78,036,846,013.20
  5. Step 5: Solve for x
    x = 78,036,846,013.20/318,730
  6. Step 6: Final answer
    x = 244,836.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.