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Finding the Fourth Proportional to 916.93, 1,375.44 and 339.67

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Solution

The fourth proportional to 916.93, 1,375.44 and 339.67 is: 509.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.93 : 1,375.44 = 339.67 : x
  2. Step 2: Convert to fraction form
    916.93/1,375.44 = 339.67/x
  3. Step 3: Cross multiply
    916.93x = 1,375.44 × 339.67
  4. Step 4: Simplify right side
    916.93x = 467,195.70
  5. Step 5: Solve for x
    x = 467,195.70/916.93
  6. Step 6: Final answer
    x = 509.52

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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.