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Finding the Fourth Proportional to 611.19, 916.79 and 245.72

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Solution

The fourth proportional to 611.19, 916.79 and 245.72 is: 368.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.19 : 916.79 = 245.72 : x
  2. Step 2: Convert to fraction form
    611.19/916.79 = 245.72/x
  3. Step 3: Cross multiply
    611.19x = 916.79 × 245.72
  4. Step 4: Simplify right side
    611.19x = 225,274.70
  5. Step 5: Solve for x
    x = 225,274.70/611.19
  6. Step 6: Final answer
    x = 368.58

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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.