Home / 2,121.51-2,928.79-1,648.34

Finding the Fourth Proportional to 2,121.51, 2,928.79 and 1,648.34

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Solution

The fourth proportional to 2,121.51, 2,928.79 and 1,648.34 is: 2,275.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.51 : 2,928.79 = 1,648.34 : x
  2. Step 2: Convert to fraction form
    2,121.51/2,928.79 = 1,648.34/x
  3. Step 3: Cross multiply
    2,121.51x = 2,928.79 × 1,648.34
  4. Step 4: Simplify right side
    2,121.51x = 4,827,641.71
  5. Step 5: Solve for x
    x = 4,827,641.71/2,121.51
  6. Step 6: Final answer
    x = 2,275.57

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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.