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Finding the Fourth Proportional to 2,381.81, 3,287.16 and 1,585.08

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Solution

The fourth proportional to 2,381.81, 3,287.16 and 1,585.08 is: 2,187.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.81 : 3,287.16 = 1,585.08 : x
  2. Step 2: Convert to fraction form
    2,381.81/3,287.16 = 1,585.08/x
  3. Step 3: Cross multiply
    2,381.81x = 3,287.16 × 1,585.08
  4. Step 4: Simplify right side
    2,381.81x = 5,210,411.57
  5. Step 5: Solve for x
    x = 5,210,411.57/2,381.81
  6. Step 6: Final answer
    x = 2,187.59

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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.