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Finding the Fourth Proportional to 936.77, 1,292.96 and 761.81

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Solution

The fourth proportional to 936.77, 1,292.96 and 761.81 is: 1,051.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.77 : 1,292.96 = 761.81 : x
  2. Step 2: Convert to fraction form
    936.77/1,292.96 = 761.81/x
  3. Step 3: Cross multiply
    936.77x = 1,292.96 × 761.81
  4. Step 4: Simplify right side
    936.77x = 984,985.30
  5. Step 5: Solve for x
    x = 984,985.30/936.77
  6. Step 6: Final answer
    x = 1,051.48

Related Problems

Find fourth proportional to 468.38, 646.48 and 380.90
Half scale
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Double scale
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Similar ratio
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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.