Home / 2,455.02-3,387.82-1,392.70

Finding the Fourth Proportional to 2,455.02, 3,387.82 and 1,392.70

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Solution

The fourth proportional to 2,455.02, 3,387.82 and 1,392.70 is: 1,921.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.02 : 3,387.82 = 1,392.70 : x
  2. Step 2: Convert to fraction form
    2,455.02/3,387.82 = 1,392.70/x
  3. Step 3: Cross multiply
    2,455.02x = 3,387.82 × 1,392.70
  4. Step 4: Simplify right side
    2,455.02x = 4,718,216.91
  5. Step 5: Solve for x
    x = 4,718,216.91/2,455.02
  6. Step 6: Final answer
    x = 1,921.86

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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.