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Finding the Fourth Proportional to 318,019.97, 477,053.31 and 118,340.34

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Solution

The fourth proportional to 318,019.97, 477,053.31 and 118,340.34 is: 177,519.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,019.97 : 477,053.31 = 118,340.34 : x
  2. Step 2: Convert to fraction form
    318,019.97/477,053.31 = 118,340.34/x
  3. Step 3: Cross multiply
    318,019.97x = 477,053.31 × 118,340.34
  4. Step 4: Simplify right side
    318,019.97x = 56,454,650,903.53
  5. Step 5: Solve for x
    x = 56,454,650,903.53/318,019.97
  6. Step 6: Final answer
    x = 177,519.20

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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.