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Finding the Fourth Proportional to 914.31, 1,371.96 and 606.31

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Solution

The fourth proportional to 914.31, 1,371.96 and 606.31 is: 909.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.31 : 1,371.96 = 606.31 : x
  2. Step 2: Convert to fraction form
    914.31/1,371.96 = 606.31/x
  3. Step 3: Cross multiply
    914.31x = 1,371.96 × 606.31
  4. Step 4: Simplify right side
    914.31x = 831,835.20
  5. Step 5: Solve for x
    x = 831,835.20/914.31
  6. Step 6: Final answer
    x = 909.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.