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Finding the Fourth Proportional to 478.61, 717.91 and 190.04

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Solution

The fourth proportional to 478.61, 717.91 and 190.04 is: 285.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.61 : 717.91 = 190.04 : x
  2. Step 2: Convert to fraction form
    478.61/717.91 = 190.04/x
  3. Step 3: Cross multiply
    478.61x = 717.91 × 190.04
  4. Step 4: Simplify right side
    478.61x = 136,433.41
  5. Step 5: Solve for x
    x = 136,433.41/478.61
  6. Step 6: Final answer
    x = 285.06

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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.