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Finding the Fourth Proportional to 691.69, 954.53 and 381.19

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Solution

The fourth proportional to 691.69, 954.53 and 381.19 is: 526.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.69 : 954.53 = 381.19 : x
  2. Step 2: Convert to fraction form
    691.69/954.53 = 381.19/x
  3. Step 3: Cross multiply
    691.69x = 954.53 × 381.19
  4. Step 4: Simplify right side
    691.69x = 363,855.86
  5. Step 5: Solve for x
    x = 363,855.86/691.69
  6. Step 6: Final answer
    x = 526.04

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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.