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Finding the Fourth Proportional to 907.78, 1,362.27 and 322.96

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Solution

The fourth proportional to 907.78, 1,362.27 and 322.96 is: 484.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.78 : 1,362.27 = 322.96 : x
  2. Step 2: Convert to fraction form
    907.78/1,362.27 = 322.96/x
  3. Step 3: Cross multiply
    907.78x = 1,362.27 × 322.96
  4. Step 4: Simplify right side
    907.78x = 439,958.72
  5. Step 5: Solve for x
    x = 439,958.72/907.78
  6. Step 6: Final answer
    x = 484.65

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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.