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Finding the Fourth Proportional to 651.38, 899.07 and 389.54

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Solution

The fourth proportional to 651.38, 899.07 and 389.54 is: 537.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.38 : 899.07 = 389.54 : x
  2. Step 2: Convert to fraction form
    651.38/899.07 = 389.54/x
  3. Step 3: Cross multiply
    651.38x = 899.07 × 389.54
  4. Step 4: Simplify right side
    651.38x = 350,224.51
  5. Step 5: Solve for x
    x = 350,224.51/651.38
  6. Step 6: Final answer
    x = 537.67

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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.