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Finding the Fourth Proportional to 469.24, 647.23 and 282.66

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Solution

The fourth proportional to 469.24, 647.23 and 282.66 is: 389.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.24 : 647.23 = 282.66 : x
  2. Step 2: Convert to fraction form
    469.24/647.23 = 282.66/x
  3. Step 3: Cross multiply
    469.24x = 647.23 × 282.66
  4. Step 4: Simplify right side
    469.24x = 182,946.03
  5. Step 5: Solve for x
    x = 182,946.03/469.24
  6. Step 6: Final answer
    x = 389.88

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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.