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Finding the Fourth Proportional to 520.73, 718.56 and 310.89

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Solution

The fourth proportional to 520.73, 718.56 and 310.89 is: 429.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.73 : 718.56 = 310.89 : x
  2. Step 2: Convert to fraction form
    520.73/718.56 = 310.89/x
  3. Step 3: Cross multiply
    520.73x = 718.56 × 310.89
  4. Step 4: Simplify right side
    520.73x = 223,390.30
  5. Step 5: Solve for x
    x = 223,390.30/520.73
  6. Step 6: Final answer
    x = 429.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.