Home / 2,160.48-2,981.55-1,216.14

Finding the Fourth Proportional to 2,160.48, 2,981.55 and 1,216.14

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Solution

The fourth proportional to 2,160.48, 2,981.55 and 1,216.14 is: 1,678.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.48 : 2,981.55 = 1,216.14 : x
  2. Step 2: Convert to fraction form
    2,160.48/2,981.55 = 1,216.14/x
  3. Step 3: Cross multiply
    2,160.48x = 2,981.55 × 1,216.14
  4. Step 4: Simplify right side
    2,160.48x = 3,625,982.22
  5. Step 5: Solve for x
    x = 3,625,982.22/2,160.48
  6. Step 6: Final answer
    x = 1,678.32

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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.