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Finding the Fourth Proportional to 1,618.78, 2,233.77 and 920.02

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Solution

The fourth proportional to 1,618.78, 2,233.77 and 920.02 is: 1,269.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.78 : 2,233.77 = 920.02 : x
  2. Step 2: Convert to fraction form
    1,618.78/2,233.77 = 920.02/x
  3. Step 3: Cross multiply
    1,618.78x = 2,233.77 × 920.02
  4. Step 4: Simplify right side
    1,618.78x = 2,055,113.08
  5. Step 5: Solve for x
    x = 2,055,113.08/1,618.78
  6. Step 6: Final answer
    x = 1,269.54

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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.