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Finding the Fourth Proportional to 907.57, 1,361.39 and 322.64

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Solution

The fourth proportional to 907.57, 1,361.39 and 322.64 is: 483.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.57 : 1,361.39 = 322.64 : x
  2. Step 2: Convert to fraction form
    907.57/1,361.39 = 322.64/x
  3. Step 3: Cross multiply
    907.57x = 1,361.39 × 322.64
  4. Step 4: Simplify right side
    907.57x = 439,232.06
  5. Step 5: Solve for x
    x = 439,232.06/907.57
  6. Step 6: Final answer
    x = 483.96

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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.