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Finding the Fourth Proportional to 1,435.64, 1,981.14 and 806.12

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Solution

The fourth proportional to 1,435.64, 1,981.14 and 806.12 is: 1,112.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.64 : 1,981.14 = 806.12 : x
  2. Step 2: Convert to fraction form
    1,435.64/1,981.14 = 806.12/x
  3. Step 3: Cross multiply
    1,435.64x = 1,981.14 × 806.12
  4. Step 4: Simplify right side
    1,435.64x = 1,597,036.58
  5. Step 5: Solve for x
    x = 1,597,036.58/1,435.64
  6. Step 6: Final answer
    x = 1,112.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.