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Finding the Fourth Proportional to 469.68, 648.56 and 314.52

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Solution

The fourth proportional to 469.68, 648.56 and 314.52 is: 434.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.68 : 648.56 = 314.52 : x
  2. Step 2: Convert to fraction form
    469.68/648.56 = 314.52/x
  3. Step 3: Cross multiply
    469.68x = 648.56 × 314.52
  4. Step 4: Simplify right side
    469.68x = 203,985.09
  5. Step 5: Solve for x
    x = 203,985.09/469.68
  6. Step 6: Final answer
    x = 434.31

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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.