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Finding the Fourth Proportional to 207,615.90, 311,423.85 and 187,276.80

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Solution

The fourth proportional to 207,615.90, 311,423.85 and 187,276.80 is: 280,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,615.90 : 311,423.85 = 187,276.80 : x
  2. Step 2: Convert to fraction form
    207,615.90/311,423.85 = 187,276.80/x
  3. Step 3: Cross multiply
    207,615.90x = 311,423.85 × 187,276.80
  4. Step 4: Simplify right side
    207,615.90x = 58,322,462,071.68
  5. Step 5: Solve for x
    x = 58,322,462,071.68/207,615.90
  6. Step 6: Final answer
    x = 280,915.20

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1.5x scale

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.