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Finding the Fourth Proportional to 318,917.11, 478,386.66 and 168,954.52

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Solution

The fourth proportional to 318,917.11, 478,386.66 and 168,954.52 is: 253,437.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,917.11 : 478,386.66 = 168,954.52 : x
  2. Step 2: Convert to fraction form
    318,917.11/478,386.66 = 168,954.52/x
  3. Step 3: Cross multiply
    318,917.11x = 478,386.66 × 168,954.52
  4. Step 4: Simplify right side
    318,917.11x = 80,825,588,514.70
  5. Step 5: Solve for x
    x = 80,825,588,514.70/318,917.11
  6. Step 6: Final answer
    x = 253,437.60

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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.