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Finding the Fourth Proportional to 499.69, 749.72 and 307.45

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Solution

The fourth proportional to 499.69, 749.72 and 307.45 is: 461.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.69 : 749.72 = 307.45 : x
  2. Step 2: Convert to fraction form
    499.69/749.72 = 307.45/x
  3. Step 3: Cross multiply
    499.69x = 749.72 × 307.45
  4. Step 4: Simplify right side
    499.69x = 230,501.41
  5. Step 5: Solve for x
    x = 230,501.41/499.69
  6. Step 6: Final answer
    x = 461.29

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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.