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Finding the Fourth Proportional to 907.84, 1,362.44 and 664.99

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Solution

The fourth proportional to 907.84, 1,362.44 and 664.99 is: 997.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.84 : 1,362.44 = 664.99 : x
  2. Step 2: Convert to fraction form
    907.84/1,362.44 = 664.99/x
  3. Step 3: Cross multiply
    907.84x = 1,362.44 × 664.99
  4. Step 4: Simplify right side
    907.84x = 906,008.98
  5. Step 5: Solve for x
    x = 906,008.98/907.84
  6. Step 6: Final answer
    x = 997.98

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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.