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Finding the Fourth Proportional to 1,585.05, 2,377.92 and 805.16

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Solution

The fourth proportional to 1,585.05, 2,377.92 and 805.16 is: 1,207.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.05 : 2,377.92 = 805.16 : x
  2. Step 2: Convert to fraction form
    1,585.05/2,377.92 = 805.16/x
  3. Step 3: Cross multiply
    1,585.05x = 2,377.92 × 805.16
  4. Step 4: Simplify right side
    1,585.05x = 1,914,606.07
  5. Step 5: Solve for x
    x = 1,914,606.07/1,585.05
  6. Step 6: Final answer
    x = 1,207.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.