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Finding the Fourth Proportional to 907.92, 1,360.94 and 445.73

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Solution

The fourth proportional to 907.92, 1,360.94 and 445.73 is: 668.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.92 : 1,360.94 = 445.73 : x
  2. Step 2: Convert to fraction form
    907.92/1,360.94 = 445.73/x
  3. Step 3: Cross multiply
    907.92x = 1,360.94 × 445.73
  4. Step 4: Simplify right side
    907.92x = 606,602.75
  5. Step 5: Solve for x
    x = 606,602.75/907.92
  6. Step 6: Final answer
    x = 668.12

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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.