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Finding the Fourth Proportional to 469.69, 648.18 and 283.19

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Solution

The fourth proportional to 469.69, 648.18 and 283.19 is: 390.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.69 : 648.18 = 283.19 : x
  2. Step 2: Convert to fraction form
    469.69/648.18 = 283.19/x
  3. Step 3: Cross multiply
    469.69x = 648.18 × 283.19
  4. Step 4: Simplify right side
    469.69x = 183,558.09
  5. Step 5: Solve for x
    x = 183,558.09/469.69
  6. Step 6: Final answer
    x = 390.81

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Double scale
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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.