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Finding the Fourth Proportional to 507.50, 700.35 and 311.09

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Solution

The fourth proportional to 507.50, 700.35 and 311.09 is: 429.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.50 : 700.35 = 311.09 : x
  2. Step 2: Convert to fraction form
    507.50/700.35 = 311.09/x
  3. Step 3: Cross multiply
    507.50x = 700.35 × 311.09
  4. Step 4: Simplify right side
    507.50x = 217,871.88
  5. Step 5: Solve for x
    x = 217,871.88/507.50
  6. Step 6: Final answer
    x = 429.30

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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.