Home / 2,478.27-3,420.02-1,359.21

Finding the Fourth Proportional to 2,478.27, 3,420.02 and 1,359.21

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Solution

The fourth proportional to 2,478.27, 3,420.02 and 1,359.21 is: 1,875.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.27 : 3,420.02 = 1,359.21 : x
  2. Step 2: Convert to fraction form
    2,478.27/3,420.02 = 1,359.21/x
  3. Step 3: Cross multiply
    2,478.27x = 3,420.02 × 1,359.21
  4. Step 4: Simplify right side
    2,478.27x = 4,648,525.38
  5. Step 5: Solve for x
    x = 4,648,525.38/2,478.27
  6. Step 6: Final answer
    x = 1,875.71

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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.