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Finding the Fourth Proportional to 2,287.05, 3,430.92 and 970.80

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Solution

The fourth proportional to 2,287.05, 3,430.92 and 970.80 is: 1,456.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.05 : 3,430.92 = 970.80 : x
  2. Step 2: Convert to fraction form
    2,287.05/3,430.92 = 970.80/x
  3. Step 3: Cross multiply
    2,287.05x = 3,430.92 × 970.80
  4. Step 4: Simplify right side
    2,287.05x = 3,330,737.14
  5. Step 5: Solve for x
    x = 3,330,737.14/2,287.05
  6. Step 6: Final answer
    x = 1,456.35

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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.