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Finding the Fourth Proportional to 693.07, 956.38 and 398.29

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Solution

The fourth proportional to 693.07, 956.38 and 398.29 is: 549.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.07 : 956.38 = 398.29 : x
  2. Step 2: Convert to fraction form
    693.07/956.38 = 398.29/x
  3. Step 3: Cross multiply
    693.07x = 956.38 × 398.29
  4. Step 4: Simplify right side
    693.07x = 380,916.59
  5. Step 5: Solve for x
    x = 380,916.59/693.07
  6. Step 6: Final answer
    x = 549.61

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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.