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Finding the Fourth Proportional to 1,585.08, 2,187.57 and 955.91

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Solution

The fourth proportional to 1,585.08, 2,187.57 and 955.91 is: 1,319.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.08 : 2,187.57 = 955.91 : x
  2. Step 2: Convert to fraction form
    1,585.08/2,187.57 = 955.91/x
  3. Step 3: Cross multiply
    1,585.08x = 2,187.57 × 955.91
  4. Step 4: Simplify right side
    1,585.08x = 2,091,109.10
  5. Step 5: Solve for x
    x = 2,091,109.10/1,585.08
  6. Step 6: Final answer
    x = 1,319.25

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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.