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Finding the Fourth Proportional to 1,169.15, 1,612.46 and 875.12

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Solution

The fourth proportional to 1,169.15, 1,612.46 and 875.12 is: 1,206.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.15 : 1,612.46 = 875.12 : x
  2. Step 2: Convert to fraction form
    1,169.15/1,612.46 = 875.12/x
  3. Step 3: Cross multiply
    1,169.15x = 1,612.46 × 875.12
  4. Step 4: Simplify right side
    1,169.15x = 1,411,091.62
  5. Step 5: Solve for x
    x = 1,411,091.62/1,169.15
  6. Step 6: Final answer
    x = 1,206.94

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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.