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Finding the Fourth Proportional to 691.96, 954.90 and 381.46

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Solution

The fourth proportional to 691.96, 954.90 and 381.46 is: 526.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.96 : 954.90 = 381.46 : x
  2. Step 2: Convert to fraction form
    691.96/954.90 = 381.46/x
  3. Step 3: Cross multiply
    691.96x = 954.90 × 381.46
  4. Step 4: Simplify right side
    691.96x = 364,256.15
  5. Step 5: Solve for x
    x = 364,256.15/691.96
  6. Step 6: Final answer
    x = 526.41

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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.