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Finding the Fourth Proportional to 2,073.66, 3,111.12 and 840.84

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Solution

The fourth proportional to 2,073.66, 3,111.12 and 840.84 is: 1,261.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,073.66 : 3,111.12 = 840.84 : x
  2. Step 2: Convert to fraction form
    2,073.66/3,111.12 = 840.84/x
  3. Step 3: Cross multiply
    2,073.66x = 3,111.12 × 840.84
  4. Step 4: Simplify right side
    2,073.66x = 2,615,954.14
  5. Step 5: Solve for x
    x = 2,615,954.14/2,073.66
  6. Step 6: Final answer
    x = 1,261.52

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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.