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Finding the Fourth Proportional to 318,927.39, 478,379.12 and 79,042.08

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Solution

The fourth proportional to 318,927.39, 478,379.12 and 79,042.08 is: 118,560.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,927.39 : 478,379.12 = 79,042.08 : x
  2. Step 2: Convert to fraction form
    318,927.39/478,379.12 = 79,042.08/x
  3. Step 3: Cross multiply
    318,927.39x = 478,379.12 × 79,042.08
  4. Step 4: Simplify right side
    318,927.39x = 37,812,080,278.16
  5. Step 5: Solve for x
    x = 37,812,080,278.16/318,927.39
  6. Step 6: Final answer
    x = 118,560.15

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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.