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Finding the Fourth Proportional to 872.76, 1,203.69 and 767.62

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Solution

The fourth proportional to 872.76, 1,203.69 and 767.62 is: 1,058.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.76 : 1,203.69 = 767.62 : x
  2. Step 2: Convert to fraction form
    872.76/1,203.69 = 767.62/x
  3. Step 3: Cross multiply
    872.76x = 1,203.69 × 767.62
  4. Step 4: Simplify right side
    872.76x = 923,976.52
  5. Step 5: Solve for x
    x = 923,976.52/872.76
  6. Step 6: Final answer
    x = 1,058.68

Related Problems

Find fourth proportional to 436.38, 601.85 and 383.81
Half scale
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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.