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Finding the Fourth Proportional to 470.74, 649.48 and 304.69

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Solution

The fourth proportional to 470.74, 649.48 and 304.69 is: 420.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.74 : 649.48 = 304.69 : x
  2. Step 2: Convert to fraction form
    470.74/649.48 = 304.69/x
  3. Step 3: Cross multiply
    470.74x = 649.48 × 304.69
  4. Step 4: Simplify right side
    470.74x = 197,886.91
  5. Step 5: Solve for x
    x = 197,886.91/470.74
  6. Step 6: Final answer
    x = 420.38

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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.