Home / 2,478.28-3,420.12-1,359.22

Finding the Fourth Proportional to 2,478.28, 3,420.12 and 1,359.22

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Solution

The fourth proportional to 2,478.28, 3,420.12 and 1,359.22 is: 1,875.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.28 : 3,420.12 = 1,359.22 : x
  2. Step 2: Convert to fraction form
    2,478.28/3,420.12 = 1,359.22/x
  3. Step 3: Cross multiply
    2,478.28x = 3,420.12 × 1,359.22
  4. Step 4: Simplify right side
    2,478.28x = 4,648,698.96
  5. Step 5: Solve for x
    x = 4,648,698.96/2,478.28
  6. Step 6: Final answer
    x = 1,875.77

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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.