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Finding the Fourth Proportional to 318,983.19, 478,458.90 and 119,288.91

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Solution

The fourth proportional to 318,983.19, 478,458.90 and 119,288.91 is: 178,927.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,983.19 : 478,458.90 = 119,288.91 : x
  2. Step 2: Convert to fraction form
    318,983.19/478,458.90 = 119,288.91/x
  3. Step 3: Cross multiply
    318,983.19x = 478,458.90 × 119,288.91
  4. Step 4: Simplify right side
    318,983.19x = 57,074,840,660.80
  5. Step 5: Solve for x
    x = 57,074,840,660.80/318,983.19
  6. Step 6: Final answer
    x = 178,927.42

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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.