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Finding the Fourth Proportional to 693.07, 956.45 and 378.34

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Solution

The fourth proportional to 693.07, 956.45 and 378.34 is: 522.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.07 : 956.45 = 378.34 : x
  2. Step 2: Convert to fraction form
    693.07/956.45 = 378.34/x
  3. Step 3: Cross multiply
    693.07x = 956.45 × 378.34
  4. Step 4: Simplify right side
    693.07x = 361,856.62
  5. Step 5: Solve for x
    x = 361,856.62/693.07
  6. Step 6: Final answer
    x = 522.11

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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.