Home / 2,159.68-2,981.36-1,628.78

Finding the Fourth Proportional to 2,159.68, 2,981.36 and 1,628.78

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Solution

The fourth proportional to 2,159.68, 2,981.36 and 1,628.78 is: 2,248.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.68 : 2,981.36 = 1,628.78 : x
  2. Step 2: Convert to fraction form
    2,159.68/2,981.36 = 1,628.78/x
  3. Step 3: Cross multiply
    2,159.68x = 2,981.36 × 1,628.78
  4. Step 4: Simplify right side
    2,159.68x = 4,855,979.54
  5. Step 5: Solve for x
    x = 4,855,979.54/2,159.68
  6. Step 6: Final answer
    x = 2,248.47

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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.