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Finding the Fourth Proportional to 533.90, 801.45 and 412.70

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Solution

The fourth proportional to 533.90, 801.45 and 412.70 is: 619.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.90 : 801.45 = 412.70 : x
  2. Step 2: Convert to fraction form
    533.90/801.45 = 412.70/x
  3. Step 3: Cross multiply
    533.90x = 801.45 × 412.70
  4. Step 4: Simplify right side
    533.90x = 330,758.42
  5. Step 5: Solve for x
    x = 330,758.42/533.90
  6. Step 6: Final answer
    x = 619.51

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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.