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Finding the Fourth Proportional to 399.23, 599.35 and 307.99

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Solution

The fourth proportional to 399.23, 599.35 and 307.99 is: 462.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.23 : 599.35 = 307.99 : x
  2. Step 2: Convert to fraction form
    399.23/599.35 = 307.99/x
  3. Step 3: Cross multiply
    399.23x = 599.35 × 307.99
  4. Step 4: Simplify right side
    399.23x = 184,593.81
  5. Step 5: Solve for x
    x = 184,593.81/399.23
  6. Step 6: Final answer
    x = 462.37

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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.