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Finding the Fourth Proportional to 1,339.32, 1,850.04 and 1,078.32

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Solution

The fourth proportional to 1,339.32, 1,850.04 and 1,078.32 is: 1,489.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.32 : 1,850.04 = 1,078.32 : x
  2. Step 2: Convert to fraction form
    1,339.32/1,850.04 = 1,078.32/x
  3. Step 3: Cross multiply
    1,339.32x = 1,850.04 × 1,078.32
  4. Step 4: Simplify right side
    1,339.32x = 1,994,935.13
  5. Step 5: Solve for x
    x = 1,994,935.13/1,339.32
  6. Step 6: Final answer
    x = 1,489.51

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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.