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Finding the Fourth Proportional to 478.63, 718.12 and 235.33

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Solution

The fourth proportional to 478.63, 718.12 and 235.33 is: 353.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.63 : 718.12 = 235.33 : x
  2. Step 2: Convert to fraction form
    478.63/718.12 = 235.33/x
  3. Step 3: Cross multiply
    478.63x = 718.12 × 235.33
  4. Step 4: Simplify right side
    478.63x = 168,994.88
  5. Step 5: Solve for x
    x = 168,994.88/478.63
  6. Step 6: Final answer
    x = 353.08

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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.