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Finding the Fourth Proportional to 1,785.75, 2,464.36 and 989.04

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Solution

The fourth proportional to 1,785.75, 2,464.36 and 989.04 is: 1,364.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.75 : 2,464.36 = 989.04 : x
  2. Step 2: Convert to fraction form
    1,785.75/2,464.36 = 989.04/x
  3. Step 3: Cross multiply
    1,785.75x = 2,464.36 × 989.04
  4. Step 4: Simplify right side
    1,785.75x = 2,437,357.38
  5. Step 5: Solve for x
    x = 2,437,357.38/1,785.75
  6. Step 6: Final answer
    x = 1,364.90

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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.