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Finding the Fourth Proportional to 949.92, 1,310.14 and 684.76

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Solution

The fourth proportional to 949.92, 1,310.14 and 684.76 is: 944.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.92 : 1,310.14 = 684.76 : x
  2. Step 2: Convert to fraction form
    949.92/1,310.14 = 684.76/x
  3. Step 3: Cross multiply
    949.92x = 1,310.14 × 684.76
  4. Step 4: Simplify right side
    949.92x = 897,131.47
  5. Step 5: Solve for x
    x = 897,131.47/949.92
  6. Step 6: Final answer
    x = 944.43

Related Problems

Find fourth proportional to 474.96, 655.07 and 342.38
Half scale
Find fourth proportional to 1,899.84, 2,620.28 and 1,369.52
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.