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Finding the Fourth Proportional to 907.35, 1,359.92 and 645.94

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Solution

The fourth proportional to 907.35, 1,359.92 and 645.94 is: 968.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.35 : 1,359.92 = 645.94 : x
  2. Step 2: Convert to fraction form
    907.35/1,359.92 = 645.94/x
  3. Step 3: Cross multiply
    907.35x = 1,359.92 × 645.94
  4. Step 4: Simplify right side
    907.35x = 878,422.52
  5. Step 5: Solve for x
    x = 878,422.52/907.35
  6. Step 6: Final answer
    x = 968.11

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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.