Home / 2,380.56-3,285.48-1,386.40

Finding the Fourth Proportional to 2,380.56, 3,285.48 and 1,386.40

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Solution

The fourth proportional to 2,380.56, 3,285.48 and 1,386.40 is: 1,913.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.56 : 3,285.48 = 1,386.40 : x
  2. Step 2: Convert to fraction form
    2,380.56/3,285.48 = 1,386.40/x
  3. Step 3: Cross multiply
    2,380.56x = 3,285.48 × 1,386.40
  4. Step 4: Simplify right side
    2,380.56x = 4,554,989.47
  5. Step 5: Solve for x
    x = 4,554,989.47/2,380.56
  6. Step 6: Final answer
    x = 1,913.41

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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.