Home / 2,117.08-2,921.56-1,172.88

Finding the Fourth Proportional to 2,117.08, 2,921.56 and 1,172.88

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Solution

The fourth proportional to 2,117.08, 2,921.56 and 1,172.88 is: 1,618.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.08 : 2,921.56 = 1,172.88 : x
  2. Step 2: Convert to fraction form
    2,117.08/2,921.56 = 1,172.88/x
  3. Step 3: Cross multiply
    2,117.08x = 2,921.56 × 1,172.88
  4. Step 4: Simplify right side
    2,117.08x = 3,426,639.29
  5. Step 5: Solve for x
    x = 3,426,639.29/2,117.08
  6. Step 6: Final answer
    x = 1,618.57

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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.