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Finding the Fourth Proportional to 318,940.65, 478,345.23 and 141,334.38

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Solution

The fourth proportional to 318,940.65, 478,345.23 and 141,334.38 is: 211,972.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,940.65 : 478,345.23 = 141,334.38 : x
  2. Step 2: Convert to fraction form
    318,940.65/478,345.23 = 141,334.38/x
  3. Step 3: Cross multiply
    318,940.65x = 478,345.23 × 141,334.38
  4. Step 4: Simplify right side
    318,940.65x = 67,606,626,508.01
  5. Step 5: Solve for x
    x = 67,606,626,508.01/318,940.65
  6. Step 6: Final answer
    x = 211,972.44

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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.