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Finding the Fourth Proportional to 651.47, 899.31 and 389.44

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Solution

The fourth proportional to 651.47, 899.31 and 389.44 is: 537.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.47 : 899.31 = 389.44 : x
  2. Step 2: Convert to fraction form
    651.47/899.31 = 389.44/x
  3. Step 3: Cross multiply
    651.47x = 899.31 × 389.44
  4. Step 4: Simplify right side
    651.47x = 350,226.50
  5. Step 5: Solve for x
    x = 350,226.50/651.47
  6. Step 6: Final answer
    x = 537.59

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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.