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Finding the Fourth Proportional to 674.75, 931.10 and 380.05

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Solution

The fourth proportional to 674.75, 931.10 and 380.05 is: 524.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.75 : 931.10 = 380.05 : x
  2. Step 2: Convert to fraction form
    674.75/931.10 = 380.05/x
  3. Step 3: Cross multiply
    674.75x = 931.10 × 380.05
  4. Step 4: Simplify right side
    674.75x = 353,860.33
  5. Step 5: Solve for x
    x = 353,860.33/674.75
  6. Step 6: Final answer
    x = 524.43

Related Problems

Find fourth proportional to 337.38, 465.55 and 190.02
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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.