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Finding the Fourth Proportional to 487.45, 669.08 and 450.51

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Solution

The fourth proportional to 487.45, 669.08 and 450.51 is: 618.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.45 : 669.08 = 450.51 : x
  2. Step 2: Convert to fraction form
    487.45/669.08 = 450.51/x
  3. Step 3: Cross multiply
    487.45x = 669.08 × 450.51
  4. Step 4: Simplify right side
    487.45x = 301,427.23
  5. Step 5: Solve for x
    x = 301,427.23/487.45
  6. Step 6: Final answer
    x = 618.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.