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Finding the Fourth Proportional to 2,187.68, 3,279.52 and 888.32

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Solution

The fourth proportional to 2,187.68, 3,279.52 and 888.32 is: 1,331.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.68 : 3,279.52 = 888.32 : x
  2. Step 2: Convert to fraction form
    2,187.68/3,279.52 = 888.32/x
  3. Step 3: Cross multiply
    2,187.68x = 3,279.52 × 888.32
  4. Step 4: Simplify right side
    2,187.68x = 2,913,263.21
  5. Step 5: Solve for x
    x = 2,913,263.21/2,187.68
  6. Step 6: Final answer
    x = 1,331.67

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1.5x scale

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.