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Finding the Fourth Proportional to 318,971.10, 478,521.45 and 108,630.30

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Solution

The fourth proportional to 318,971.10, 478,521.45 and 108,630.30 is: 162,967.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,971.10 : 478,521.45 = 108,630.30 : x
  2. Step 2: Convert to fraction form
    318,971.10/478,521.45 = 108,630.30/x
  3. Step 3: Cross multiply
    318,971.10x = 478,521.45 × 108,630.30
  4. Step 4: Simplify right side
    318,971.10x = 51,981,928,669.94
  5. Step 5: Solve for x
    x = 51,981,928,669.94/318,971.10
  6. Step 6: Final answer
    x = 162,967.52

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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.