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Finding the Fourth Proportional to 611.52, 916.56 and 286.50

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Solution

The fourth proportional to 611.52, 916.56 and 286.50 is: 429.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.52 : 916.56 = 286.50 : x
  2. Step 2: Convert to fraction form
    611.52/916.56 = 286.50/x
  3. Step 3: Cross multiply
    611.52x = 916.56 × 286.50
  4. Step 4: Simplify right side
    611.52x = 262,594.44
  5. Step 5: Solve for x
    x = 262,594.44/611.52
  6. Step 6: Final answer
    x = 429.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.