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Finding the Fourth Proportional to 646.59, 892.29 and 384.60

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Solution

The fourth proportional to 646.59, 892.29 and 384.60 is: 530.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.59 : 892.29 = 384.60 : x
  2. Step 2: Convert to fraction form
    646.59/892.29 = 384.60/x
  3. Step 3: Cross multiply
    646.59x = 892.29 × 384.60
  4. Step 4: Simplify right side
    646.59x = 343,174.73
  5. Step 5: Solve for x
    x = 343,174.73/646.59
  6. Step 6: Final answer
    x = 530.75

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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.