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Finding the Fourth Proportional to 508.01, 700.97 and 311.45

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Solution

The fourth proportional to 508.01, 700.97 and 311.45 is: 429.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.01 : 700.97 = 311.45 : x
  2. Step 2: Convert to fraction form
    508.01/700.97 = 311.45/x
  3. Step 3: Cross multiply
    508.01x = 700.97 × 311.45
  4. Step 4: Simplify right side
    508.01x = 218,319.64
  5. Step 5: Solve for x
    x = 218,319.64/508.01
  6. Step 6: Final answer
    x = 429.75

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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.