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Finding the Fourth Proportional to 468.74, 646.70 and 282.09

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Solution

The fourth proportional to 468.74, 646.70 and 282.09 is: 389.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.74 : 646.70 = 282.09 : x
  2. Step 2: Convert to fraction form
    468.74/646.70 = 282.09/x
  3. Step 3: Cross multiply
    468.74x = 646.70 × 282.09
  4. Step 4: Simplify right side
    468.74x = 182,426.57
  5. Step 5: Solve for x
    x = 182,426.57/468.74
  6. Step 6: Final answer
    x = 389.18

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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.