Home / 2,187.84-3,020.52-1,403.20

Finding the Fourth Proportional to 2,187.84, 3,020.52 and 1,403.20

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Solution

The fourth proportional to 2,187.84, 3,020.52 and 1,403.20 is: 1,937.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.84 : 3,020.52 = 1,403.20 : x
  2. Step 2: Convert to fraction form
    2,187.84/3,020.52 = 1,403.20/x
  3. Step 3: Cross multiply
    2,187.84x = 3,020.52 × 1,403.20
  4. Step 4: Simplify right side
    2,187.84x = 4,238,393.66
  5. Step 5: Solve for x
    x = 4,238,393.66/2,187.84
  6. Step 6: Final answer
    x = 1,937.25

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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.