Home / 2,478.42-3,420.14-1,359.35

Finding the Fourth Proportional to 2,478.42, 3,420.14 and 1,359.35

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Solution

The fourth proportional to 2,478.42, 3,420.14 and 1,359.35 is: 1,875.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.42 : 3,420.14 = 1,359.35 : x
  2. Step 2: Convert to fraction form
    2,478.42/3,420.14 = 1,359.35/x
  3. Step 3: Cross multiply
    2,478.42x = 3,420.14 × 1,359.35
  4. Step 4: Simplify right side
    2,478.42x = 4,649,143.41
  5. Step 5: Solve for x
    x = 4,649,143.41/2,478.42
  6. Step 6: Final answer
    x = 1,875.85

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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.