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Finding the Fourth Proportional to 2,125.69, 3,189.34 and 970.63

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Solution

The fourth proportional to 2,125.69, 3,189.34 and 970.63 is: 1,456.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.69 : 3,189.34 = 970.63 : x
  2. Step 2: Convert to fraction form
    2,125.69/3,189.34 = 970.63/x
  3. Step 3: Cross multiply
    2,125.69x = 3,189.34 × 970.63
  4. Step 4: Simplify right side
    2,125.69x = 3,095,669.08
  5. Step 5: Solve for x
    x = 3,095,669.08/2,125.69
  6. Step 6: Final answer
    x = 1,456.31

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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.