Home / 2,215.84-3,059.58-1,377.76

Finding the Fourth Proportional to 2,215.84, 3,059.58 and 1,377.76

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Solution

The fourth proportional to 2,215.84, 3,059.58 and 1,377.76 is: 1,902.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.84 : 3,059.58 = 1,377.76 : x
  2. Step 2: Convert to fraction form
    2,215.84/3,059.58 = 1,377.76/x
  3. Step 3: Cross multiply
    2,215.84x = 3,059.58 × 1,377.76
  4. Step 4: Simplify right side
    2,215.84x = 4,215,366.94
  5. Step 5: Solve for x
    x = 4,215,366.94/2,215.84
  6. Step 6: Final answer
    x = 1,902.38

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Half scale
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Double scale
Find fourth proportional to 2,216.84, 3,060.96 and 1,378.76
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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.