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Finding the Fourth Proportional to 651.41, 899.11 and 389.38

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Solution

The fourth proportional to 651.41, 899.11 and 389.38 is: 537.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.41 : 899.11 = 389.38 : x
  2. Step 2: Convert to fraction form
    651.41/899.11 = 389.38/x
  3. Step 3: Cross multiply
    651.41x = 899.11 × 389.38
  4. Step 4: Simplify right side
    651.41x = 350,095.45
  5. Step 5: Solve for x
    x = 350,095.45/651.41
  6. Step 6: Final answer
    x = 537.44

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Double scale
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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.