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Finding the Fourth Proportional to 2,499.66, 3,749.49 and 768.30

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Solution

The fourth proportional to 2,499.66, 3,749.49 and 768.30 is: 1,152.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,499.66 : 3,749.49 = 768.30 : x
  2. Step 2: Convert to fraction form
    2,499.66/3,749.49 = 768.30/x
  3. Step 3: Cross multiply
    2,499.66x = 3,749.49 × 768.30
  4. Step 4: Simplify right side
    2,499.66x = 2,880,733.17
  5. Step 5: Solve for x
    x = 2,880,733.17/2,499.66
  6. Step 6: Final answer
    x = 1,152.45

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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.