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Finding the Fourth Proportional to 478.93, 718.43 and 235.51

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Solution

The fourth proportional to 478.93, 718.43 and 235.51 is: 353.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.93 : 718.43 = 235.51 : x
  2. Step 2: Convert to fraction form
    478.93/718.43 = 235.51/x
  3. Step 3: Cross multiply
    478.93x = 718.43 × 235.51
  4. Step 4: Simplify right side
    478.93x = 169,197.45
  5. Step 5: Solve for x
    x = 169,197.45/478.93
  6. Step 6: Final answer
    x = 353.28

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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.