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Finding the Fourth Proportional to 469.92, 648.36 and 292.80

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Solution

The fourth proportional to 469.92, 648.36 and 292.80 is: 403.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.92 : 648.36 = 292.80 : x
  2. Step 2: Convert to fraction form
    469.92/648.36 = 292.80/x
  3. Step 3: Cross multiply
    469.92x = 648.36 × 292.80
  4. Step 4: Simplify right side
    469.92x = 189,839.81
  5. Step 5: Solve for x
    x = 189,839.81/469.92
  6. Step 6: Final answer
    x = 403.98

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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.