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Finding the Fourth Proportional to 469.28, 647.66 and 294.63

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Solution

The fourth proportional to 469.28, 647.66 and 294.63 is: 406.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.28 : 647.66 = 294.63 : x
  2. Step 2: Convert to fraction form
    469.28/647.66 = 294.63/x
  3. Step 3: Cross multiply
    469.28x = 647.66 × 294.63
  4. Step 4: Simplify right side
    469.28x = 190,816.83
  5. Step 5: Solve for x
    x = 190,816.83/469.28
  6. Step 6: Final answer
    x = 406.62

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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.