Home / 2,235.48-3,084.78-1,240.80

Finding the Fourth Proportional to 2,235.48, 3,084.78 and 1,240.80

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Solution

The fourth proportional to 2,235.48, 3,084.78 and 1,240.80 is: 1,712.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,235.48 : 3,084.78 = 1,240.80 : x
  2. Step 2: Convert to fraction form
    2,235.48/3,084.78 = 1,240.80/x
  3. Step 3: Cross multiply
    2,235.48x = 3,084.78 × 1,240.80
  4. Step 4: Simplify right side
    2,235.48x = 3,827,595.02
  5. Step 5: Solve for x
    x = 3,827,595.02/2,235.48
  6. Step 6: Final answer
    x = 1,712.20

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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.