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Finding the Fourth Proportional to 318,861.50, 440,059.92 and 238,148.88

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Solution

The fourth proportional to 318,861.50, 440,059.92 and 238,148.88 is: 328,668.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,861.50 : 440,059.92 = 238,148.88 : x
  2. Step 2: Convert to fraction form
    318,861.50/440,059.92 = 238,148.88/x
  3. Step 3: Cross multiply
    318,861.50x = 440,059.92 × 238,148.88
  4. Step 4: Simplify right side
    318,861.50x = 104,799,777,080.89
  5. Step 5: Solve for x
    x = 104,799,777,080.89/318,861.50
  6. Step 6: Final answer
    x = 328,668.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.