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Finding the Fourth Proportional to 651.31, 898.62 and 389.27

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Solution

The fourth proportional to 651.31, 898.62 and 389.27 is: 537.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.31 : 898.62 = 389.27 : x
  2. Step 2: Convert to fraction form
    651.31/898.62 = 389.27/x
  3. Step 3: Cross multiply
    651.31x = 898.62 × 389.27
  4. Step 4: Simplify right side
    651.31x = 349,806.59
  5. Step 5: Solve for x
    x = 349,806.59/651.31
  6. Step 6: Final answer
    x = 537.08

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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.