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Finding the Fourth Proportional to 478.55, 718.14 and 234.95

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Solution

The fourth proportional to 478.55, 718.14 and 234.95 is: 352.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.55 : 718.14 = 234.95 : x
  2. Step 2: Convert to fraction form
    478.55/718.14 = 234.95/x
  3. Step 3: Cross multiply
    478.55x = 718.14 × 234.95
  4. Step 4: Simplify right side
    478.55x = 168,726.99
  5. Step 5: Solve for x
    x = 168,726.99/478.55
  6. Step 6: Final answer
    x = 352.58

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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.