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Finding the Fourth Proportional to 487.30, 671.56 and 450.07

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Solution

The fourth proportional to 487.30, 671.56 and 450.07 is: 620.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.30 : 671.56 = 450.07 : x
  2. Step 2: Convert to fraction form
    487.30/671.56 = 450.07/x
  3. Step 3: Cross multiply
    487.30x = 671.56 × 450.07
  4. Step 4: Simplify right side
    487.30x = 302,249.01
  5. Step 5: Solve for x
    x = 302,249.01/487.30
  6. Step 6: Final answer
    x = 620.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.