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Finding the Fourth Proportional to 469.99, 648.66 and 283.51

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Solution

The fourth proportional to 469.99, 648.66 and 283.51 is: 391.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.99 : 648.66 = 283.51 : x
  2. Step 2: Convert to fraction form
    469.99/648.66 = 283.51/x
  3. Step 3: Cross multiply
    469.99x = 648.66 × 283.51
  4. Step 4: Simplify right side
    469.99x = 183,901.05
  5. Step 5: Solve for x
    x = 183,901.05/469.99
  6. Step 6: Final answer
    x = 391.29

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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.