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Finding the Fourth Proportional to 347,819.10, 521,728.65 and 318,659.10

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Solution

The fourth proportional to 347,819.10, 521,728.65 and 318,659.10 is: 477,988.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,819.10 : 521,728.65 = 318,659.10 : x
  2. Step 2: Convert to fraction form
    347,819.10/521,728.65 = 318,659.10/x
  3. Step 3: Cross multiply
    347,819.10x = 521,728.65 × 318,659.10
  4. Step 4: Simplify right side
    347,819.10x = 166,253,582,053.22
  5. Step 5: Solve for x
    x = 166,253,582,053.22/347,819.10
  6. Step 6: Final answer
    x = 477,988.65

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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.