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Finding the Fourth Proportional to 650.51, 976.20 and 430.66

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Solution

The fourth proportional to 650.51, 976.20 and 430.66 is: 646.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.51 : 976.20 = 430.66 : x
  2. Step 2: Convert to fraction form
    650.51/976.20 = 430.66/x
  3. Step 3: Cross multiply
    650.51x = 976.20 × 430.66
  4. Step 4: Simplify right side
    650.51x = 420,410.29
  5. Step 5: Solve for x
    x = 420,410.29/650.51
  6. Step 6: Final answer
    x = 646.28

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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.