Home / 1,722.20-2,376.61-976.15

Finding the Fourth Proportional to 1,722.20, 2,376.61 and 976.15

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Solution

The fourth proportional to 1,722.20, 2,376.61 and 976.15 is: 1,347.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.20 : 2,376.61 = 976.15 : x
  2. Step 2: Convert to fraction form
    1,722.20/2,376.61 = 976.15/x
  3. Step 3: Cross multiply
    1,722.20x = 2,376.61 × 976.15
  4. Step 4: Simplify right side
    1,722.20x = 2,319,927.85
  5. Step 5: Solve for x
    x = 2,319,927.85/1,722.20
  6. Step 6: Final answer
    x = 1,347.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.