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Finding the Fourth Proportional to 433.28, 648.47 and 307.56

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Solution

The fourth proportional to 433.28, 648.47 and 307.56 is: 460.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.28 : 648.47 = 307.56 : x
  2. Step 2: Convert to fraction form
    433.28/648.47 = 307.56/x
  3. Step 3: Cross multiply
    433.28x = 648.47 × 307.56
  4. Step 4: Simplify right side
    433.28x = 199,444.20
  5. Step 5: Solve for x
    x = 199,444.20/433.28
  6. Step 6: Final answer
    x = 460.32

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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.