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Finding the Fourth Proportional to 865.75, 1,194.74 and 555.25

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Solution

The fourth proportional to 865.75, 1,194.74 and 555.25 is: 766.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.75 : 1,194.74 = 555.25 : x
  2. Step 2: Convert to fraction form
    865.75/1,194.74 = 555.25/x
  3. Step 3: Cross multiply
    865.75x = 1,194.74 × 555.25
  4. Step 4: Simplify right side
    865.75x = 663,379.39
  5. Step 5: Solve for x
    x = 663,379.39/865.75
  6. Step 6: Final answer
    x = 766.25

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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.