Home / 2,478.40-3,420.06-1,359.28

Finding the Fourth Proportional to 2,478.40, 3,420.06 and 1,359.28

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Solution

The fourth proportional to 2,478.40, 3,420.06 and 1,359.28 is: 1,875.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.40 : 3,420.06 = 1,359.28 : x
  2. Step 2: Convert to fraction form
    2,478.40/3,420.06 = 1,359.28/x
  3. Step 3: Cross multiply
    2,478.40x = 3,420.06 × 1,359.28
  4. Step 4: Simplify right side
    2,478.40x = 4,648,819.16
  5. Step 5: Solve for x
    x = 4,648,819.16/2,478.40
  6. Step 6: Final answer
    x = 1,875.73

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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.