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Finding the Fourth Proportional to 883.73, 1,218.53 and 634.25

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Solution

The fourth proportional to 883.73, 1,218.53 and 634.25 is: 874.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.73 : 1,218.53 = 634.25 : x
  2. Step 2: Convert to fraction form
    883.73/1,218.53 = 634.25/x
  3. Step 3: Cross multiply
    883.73x = 1,218.53 × 634.25
  4. Step 4: Simplify right side
    883.73x = 772,848.15
  5. Step 5: Solve for x
    x = 772,848.15/883.73
  6. Step 6: Final answer
    x = 874.53

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Double scale
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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.