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Finding the Fourth Proportional to 399.60, 599.40 and 307.26

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Solution

The fourth proportional to 399.60, 599.40 and 307.26 is: 460.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.60 : 599.40 = 307.26 : x
  2. Step 2: Convert to fraction form
    399.60/599.40 = 307.26/x
  3. Step 3: Cross multiply
    399.60x = 599.40 × 307.26
  4. Step 4: Simplify right side
    399.60x = 184,171.64
  5. Step 5: Solve for x
    x = 184,171.64/399.60
  6. Step 6: Final answer
    x = 460.89

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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.