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Finding the Fourth Proportional to 676.17, 933.12 and 381.45

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Solution

The fourth proportional to 676.17, 933.12 and 381.45 is: 526.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.17 : 933.12 = 381.45 : x
  2. Step 2: Convert to fraction form
    676.17/933.12 = 381.45/x
  3. Step 3: Cross multiply
    676.17x = 933.12 × 381.45
  4. Step 4: Simplify right side
    676.17x = 355,938.62
  5. Step 5: Solve for x
    x = 355,938.62/676.17
  6. Step 6: Final answer
    x = 526.40

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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.