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Finding the Fourth Proportional to 469.72, 647.96 and 295

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Solution

The fourth proportional to 469.72, 647.96 and 295 is: 406.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.72 : 647.96 = 295 : x
  2. Step 2: Convert to fraction form
    469.72/647.96 = 295/x
  3. Step 3: Cross multiply
    469.72x = 647.96 × 295
  4. Step 4: Simplify right side
    469.72x = 191,148.20
  5. Step 5: Solve for x
    x = 191,148.20/469.72
  6. Step 6: Final answer
    x = 406.94

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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.