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Finding the Fourth Proportional to 916.35, 1,372.38 and 607.43

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Solution

The fourth proportional to 916.35, 1,372.38 and 607.43 is: 909.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.35 : 1,372.38 = 607.43 : x
  2. Step 2: Convert to fraction form
    916.35/1,372.38 = 607.43/x
  3. Step 3: Cross multiply
    916.35x = 1,372.38 × 607.43
  4. Step 4: Simplify right side
    916.35x = 833,625.94
  5. Step 5: Solve for x
    x = 833,625.94/916.35
  6. Step 6: Final answer
    x = 909.73

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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.