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Finding the Fourth Proportional to 1,881.66, 2,820.86 and 906.42

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Solution

The fourth proportional to 1,881.66, 2,820.86 and 906.42 is: 1,358.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.66 : 2,820.86 = 906.42 : x
  2. Step 2: Convert to fraction form
    1,881.66/2,820.86 = 906.42/x
  3. Step 3: Cross multiply
    1,881.66x = 2,820.86 × 906.42
  4. Step 4: Simplify right side
    1,881.66x = 2,556,883.92
  5. Step 5: Solve for x
    x = 2,556,883.92/1,881.66
  6. Step 6: Final answer
    x = 1,358.84

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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.