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Finding the Fourth Proportional to 674.76, 931.26 and 380.09

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Solution

The fourth proportional to 674.76, 931.26 and 380.09 is: 524.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.76 : 931.26 = 380.09 : x
  2. Step 2: Convert to fraction form
    674.76/931.26 = 380.09/x
  3. Step 3: Cross multiply
    674.76x = 931.26 × 380.09
  4. Step 4: Simplify right side
    674.76x = 353,957.96
  5. Step 5: Solve for x
    x = 353,957.96/674.76
  6. Step 6: Final answer
    x = 524.57

Related Problems

Find fourth proportional to 337.38, 465.63 and 190.04
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.