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Finding the Fourth Proportional to 2,287.75, 3,430.95 and 971.49

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Solution

The fourth proportional to 2,287.75, 3,430.95 and 971.49 is: 1,456.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.75 : 3,430.95 = 971.49 : x
  2. Step 2: Convert to fraction form
    2,287.75/3,430.95 = 971.49/x
  3. Step 3: Cross multiply
    2,287.75x = 3,430.95 × 971.49
  4. Step 4: Simplify right side
    2,287.75x = 3,333,133.62
  5. Step 5: Solve for x
    x = 3,333,133.62/2,287.75
  6. Step 6: Final answer
    x = 1,456.95

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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.