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Finding the Fourth Proportional to 1,585.08, 2,376.61 and 661.28

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Solution

The fourth proportional to 1,585.08, 2,376.61 and 661.28 is: 991.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.08 : 2,376.61 = 661.28 : x
  2. Step 2: Convert to fraction form
    1,585.08/2,376.61 = 661.28/x
  3. Step 3: Cross multiply
    1,585.08x = 2,376.61 × 661.28
  4. Step 4: Simplify right side
    1,585.08x = 1,571,591.12
  5. Step 5: Solve for x
    x = 1,571,591.12/1,585.08
  6. Step 6: Final answer
    x = 991.49

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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.