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Finding the Fourth Proportional to 2,155.74, 2,975.28 and 1,801.17

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Solution

The fourth proportional to 2,155.74, 2,975.28 and 1,801.17 is: 2,485.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.74 : 2,975.28 = 1,801.17 : x
  2. Step 2: Convert to fraction form
    2,155.74/2,975.28 = 1,801.17/x
  3. Step 3: Cross multiply
    2,155.74x = 2,975.28 × 1,801.17
  4. Step 4: Simplify right side
    2,155.74x = 5,358,985.08
  5. Step 5: Solve for x
    x = 5,358,985.08/2,155.74
  6. Step 6: Final answer
    x = 2,485.91

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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.