Home / 2,685.28-4,024.56-1,386.40

Finding the Fourth Proportional to 2,685.28, 4,024.56 and 1,386.40

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Solution

The fourth proportional to 2,685.28, 4,024.56 and 1,386.40 is: 2,077.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.28 : 4,024.56 = 1,386.40 : x
  2. Step 2: Convert to fraction form
    2,685.28/4,024.56 = 1,386.40/x
  3. Step 3: Cross multiply
    2,685.28x = 4,024.56 × 1,386.40
  4. Step 4: Simplify right side
    2,685.28x = 5,579,649.98
  5. Step 5: Solve for x
    x = 5,579,649.98/2,685.28
  6. Step 6: Final answer
    x = 2,077.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.