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Finding the Fourth Proportional to 611.43, 916.47 and 245.99

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Solution

The fourth proportional to 611.43, 916.47 and 245.99 is: 368.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.43 : 916.47 = 245.99 : x
  2. Step 2: Convert to fraction form
    611.43/916.47 = 245.99/x
  3. Step 3: Cross multiply
    611.43x = 916.47 × 245.99
  4. Step 4: Simplify right side
    611.43x = 225,437.87
  5. Step 5: Solve for x
    x = 225,437.87/611.43
  6. Step 6: Final answer
    x = 368.71

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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.