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Finding the Fourth Proportional to 470.18, 648.69 and 304.51

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Solution

The fourth proportional to 470.18, 648.69 and 304.51 is: 420.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.18 : 648.69 = 304.51 : x
  2. Step 2: Convert to fraction form
    470.18/648.69 = 304.51/x
  3. Step 3: Cross multiply
    470.18x = 648.69 × 304.51
  4. Step 4: Simplify right side
    470.18x = 197,532.59
  5. Step 5: Solve for x
    x = 197,532.59/470.18
  6. Step 6: Final answer
    x = 420.12

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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.