Home / 2,421.78-3,342.10-1,373.88

Finding the Fourth Proportional to 2,421.78, 3,342.10 and 1,373.88

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Solution

The fourth proportional to 2,421.78, 3,342.10 and 1,373.88 is: 1,895.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.78 : 3,342.10 = 1,373.88 : x
  2. Step 2: Convert to fraction form
    2,421.78/3,342.10 = 1,373.88/x
  3. Step 3: Cross multiply
    2,421.78x = 3,342.10 × 1,373.88
  4. Step 4: Simplify right side
    2,421.78x = 4,591,644.35
  5. Step 5: Solve for x
    x = 4,591,644.35/2,421.78
  6. Step 6: Final answer
    x = 1,895.98

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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.