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Finding the Fourth Proportional to 1,155.22, 1,594.83 and 782.08

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Solution

The fourth proportional to 1,155.22, 1,594.83 and 782.08 is: 1,079.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.22 : 1,594.83 = 782.08 : x
  2. Step 2: Convert to fraction form
    1,155.22/1,594.83 = 782.08/x
  3. Step 3: Cross multiply
    1,155.22x = 1,594.83 × 782.08
  4. Step 4: Simplify right side
    1,155.22x = 1,247,284.65
  5. Step 5: Solve for x
    x = 1,247,284.65/1,155.22
  6. Step 6: Final answer
    x = 1,079.69

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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.