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Finding the Fourth Proportional to 695,885.78, 960,321.72 and 389,964.58

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Solution

The fourth proportional to 695,885.78, 960,321.72 and 389,964.58 is: 538,150.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,885.78 : 960,321.72 = 389,964.58 : x
  2. Step 2: Convert to fraction form
    695,885.78/960,321.72 = 389,964.58/x
  3. Step 3: Cross multiply
    695,885.78x = 960,321.72 × 389,964.58
  4. Step 4: Simplify right side
    695,885.78x = 374,491,455,266.24
  5. Step 5: Solve for x
    x = 374,491,455,266.24/695,885.78
  6. Step 6: Final answer
    x = 538,150.75

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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.