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Finding the Fourth Proportional to 907.83, 1,361.61 and 330.71

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Solution

The fourth proportional to 907.83, 1,361.61 and 330.71 is: 496.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.83 : 1,361.61 = 330.71 : x
  2. Step 2: Convert to fraction form
    907.83/1,361.61 = 330.71/x
  3. Step 3: Cross multiply
    907.83x = 1,361.61 × 330.71
  4. Step 4: Simplify right side
    907.83x = 450,291.24
  5. Step 5: Solve for x
    x = 450,291.24/907.83
  6. Step 6: Final answer
    x = 496.01

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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.