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Finding the Fourth Proportional to 2,125.81, 3,188.72 and 970.93

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Solution

The fourth proportional to 2,125.81, 3,188.72 and 970.93 is: 1,456.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.81 : 3,188.72 = 970.93 : x
  2. Step 2: Convert to fraction form
    2,125.81/3,188.72 = 970.93/x
  3. Step 3: Cross multiply
    2,125.81x = 3,188.72 × 970.93
  4. Step 4: Simplify right side
    2,125.81x = 3,096,023.91
  5. Step 5: Solve for x
    x = 3,096,023.91/2,125.81
  6. Step 6: Final answer
    x = 1,456.40

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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.