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Finding the Fourth Proportional to 611.11, 915.91 and 245.70

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Solution

The fourth proportional to 611.11, 915.91 and 245.70 is: 368.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.11 : 915.91 = 245.70 : x
  2. Step 2: Convert to fraction form
    611.11/915.91 = 245.70/x
  3. Step 3: Cross multiply
    611.11x = 915.91 × 245.70
  4. Step 4: Simplify right side
    611.11x = 225,038.47
  5. Step 5: Solve for x
    x = 225,038.47/611.11
  6. Step 6: Final answer
    x = 368.24

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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.