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Finding the Fourth Proportional to 475.95, 714.29 and 321.51

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Solution

The fourth proportional to 475.95, 714.29 and 321.51 is: 482.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.95 : 714.29 = 321.51 : x
  2. Step 2: Convert to fraction form
    475.95/714.29 = 321.51/x
  3. Step 3: Cross multiply
    475.95x = 714.29 × 321.51
  4. Step 4: Simplify right side
    475.95x = 229,649.77
  5. Step 5: Solve for x
    x = 229,649.77/475.95
  6. Step 6: Final answer
    x = 482.51

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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.