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Finding the Fourth Proportional to 1,785.42, 2,678.14 and 552.80

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Solution

The fourth proportional to 1,785.42, 2,678.14 and 552.80 is: 829.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.42 : 2,678.14 = 552.80 : x
  2. Step 2: Convert to fraction form
    1,785.42/2,678.14 = 552.80/x
  3. Step 3: Cross multiply
    1,785.42x = 2,678.14 × 552.80
  4. Step 4: Simplify right side
    1,785.42x = 1,480,481.11
  5. Step 5: Solve for x
    x = 1,480,481.11/1,785.42
  6. Step 6: Final answer
    x = 829.21

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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.