Home / 318,981.19-478,455.89-119,286.90

Finding the Fourth Proportional to 318,981.19, 478,455.89 and 119,286.90

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Solution

The fourth proportional to 318,981.19, 478,455.89 and 119,286.90 is: 178,924.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,981.19 : 478,455.89 = 119,286.90 : x
  2. Step 2: Convert to fraction form
    318,981.19/478,455.89 = 119,286.90/x
  3. Step 3: Cross multiply
    318,981.19x = 478,455.89 × 119,286.90
  4. Step 4: Simplify right side
    318,981.19x = 57,073,519,904.84
  5. Step 5: Solve for x
    x = 57,073,519,904.84/318,981.19
  6. Step 6: Final answer
    x = 178,924.41

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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.