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Finding the Fourth Proportional to 1,468.80, 2,188.80 and 1,339.20

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Solution

The fourth proportional to 1,468.80, 2,188.80 and 1,339.20 is: 1,995.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,468.80 : 2,188.80 = 1,339.20 : x
  2. Step 2: Convert to fraction form
    1,468.80/2,188.80 = 1,339.20/x
  3. Step 3: Cross multiply
    1,468.80x = 2,188.80 × 1,339.20
  4. Step 4: Simplify right side
    1,468.80x = 2,931,240.96
  5. Step 5: Solve for x
    x = 2,931,240.96/1,468.80
  6. Step 6: Final answer
    x = 1,995.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.