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Finding the Fourth Proportional to 478.90, 718.26 and 170.77

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Solution

The fourth proportional to 478.90, 718.26 and 170.77 is: 256.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.90 : 718.26 = 170.77 : x
  2. Step 2: Convert to fraction form
    478.90/718.26 = 170.77/x
  3. Step 3: Cross multiply
    478.90x = 718.26 × 170.77
  4. Step 4: Simplify right side
    478.90x = 122,657.26
  5. Step 5: Solve for x
    x = 122,657.26/478.90
  6. Step 6: Final answer
    x = 256.12

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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.