Home / 2,311.79-3,189.48-1,415.95

Finding the Fourth Proportional to 2,311.79, 3,189.48 and 1,415.95

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Solution

The fourth proportional to 2,311.79, 3,189.48 and 1,415.95 is: 1,953.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.79 : 3,189.48 = 1,415.95 : x
  2. Step 2: Convert to fraction form
    2,311.79/3,189.48 = 1,415.95/x
  3. Step 3: Cross multiply
    2,311.79x = 3,189.48 × 1,415.95
  4. Step 4: Simplify right side
    2,311.79x = 4,516,130.92
  5. Step 5: Solve for x
    x = 4,516,130.92/2,311.79
  6. Step 6: Final answer
    x = 1,953.53

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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.