Home / 2,435.80-3,360-1,387.72

Finding the Fourth Proportional to 2,435.80, 3,360 and 1,387.72

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Solution

The fourth proportional to 2,435.80, 3,360 and 1,387.72 is: 1,914.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,435.80 : 3,360 = 1,387.72 : x
  2. Step 2: Convert to fraction form
    2,435.80/3,360 = 1,387.72/x
  3. Step 3: Cross multiply
    2,435.80x = 3,360 × 1,387.72
  4. Step 4: Simplify right side
    2,435.80x = 4,662,739.20
  5. Step 5: Solve for x
    x = 4,662,739.20/2,435.80
  6. Step 6: Final answer
    x = 1,914.25

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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.