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Finding the Fourth Proportional to 1,760.76, 2,640.38 and 785.56

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Solution

The fourth proportional to 1,760.76, 2,640.38 and 785.56 is: 1,178.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.76 : 2,640.38 = 785.56 : x
  2. Step 2: Convert to fraction form
    1,760.76/2,640.38 = 785.56/x
  3. Step 3: Cross multiply
    1,760.76x = 2,640.38 × 785.56
  4. Step 4: Simplify right side
    1,760.76x = 2,074,176.91
  5. Step 5: Solve for x
    x = 2,074,176.91/1,760.76
  6. Step 6: Final answer
    x = 1,178.00

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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.