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Finding the Fourth Proportional to 476.24, 714.87 and 421.73

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Solution

The fourth proportional to 476.24, 714.87 and 421.73 is: 633.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.24 : 714.87 = 421.73 : x
  2. Step 2: Convert to fraction form
    476.24/714.87 = 421.73/x
  3. Step 3: Cross multiply
    476.24x = 714.87 × 421.73
  4. Step 4: Simplify right side
    476.24x = 301,482.06
  5. Step 5: Solve for x
    x = 301,482.06/476.24
  6. Step 6: Final answer
    x = 633.05

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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.