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Finding the Fourth Proportional to 399.07, 597.75 and 307.09

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Solution

The fourth proportional to 399.07, 597.75 and 307.09 is: 459.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.07 : 597.75 = 307.09 : x
  2. Step 2: Convert to fraction form
    399.07/597.75 = 307.09/x
  3. Step 3: Cross multiply
    399.07x = 597.75 × 307.09
  4. Step 4: Simplify right side
    399.07x = 183,563.05
  5. Step 5: Solve for x
    x = 183,563.05/399.07
  6. Step 6: Final answer
    x = 459.98

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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.