Home / 2,478.78-3,420.66-1,430.88

Finding the Fourth Proportional to 2,478.78, 3,420.66 and 1,430.88

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Solution

The fourth proportional to 2,478.78, 3,420.66 and 1,430.88 is: 1,974.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.78 : 3,420.66 = 1,430.88 : x
  2. Step 2: Convert to fraction form
    2,478.78/3,420.66 = 1,430.88/x
  3. Step 3: Cross multiply
    2,478.78x = 3,420.66 × 1,430.88
  4. Step 4: Simplify right side
    2,478.78x = 4,894,553.98
  5. Step 5: Solve for x
    x = 4,894,553.98/2,478.78
  6. Step 6: Final answer
    x = 1,974.58

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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.