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Finding the Fourth Proportional to 469.82, 648.36 and 283.32

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Solution

The fourth proportional to 469.82, 648.36 and 283.32 is: 390.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.82 : 648.36 = 283.32 : x
  2. Step 2: Convert to fraction form
    469.82/648.36 = 283.32/x
  3. Step 3: Cross multiply
    469.82x = 648.36 × 283.32
  4. Step 4: Simplify right side
    469.82x = 183,693.36
  5. Step 5: Solve for x
    x = 183,693.36/469.82
  6. Step 6: Final answer
    x = 390.99

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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.