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Finding the Fourth Proportional to 618,904.48, 928,421.36 and 263,956

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Solution

The fourth proportional to 618,904.48, 928,421.36 and 263,956 is: 395,961.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,904.48 : 928,421.36 = 263,956 : x
  2. Step 2: Convert to fraction form
    618,904.48/928,421.36 = 263,956/x
  3. Step 3: Cross multiply
    618,904.48x = 928,421.36 × 263,956
  4. Step 4: Simplify right side
    618,904.48x = 245,062,388,500.16
  5. Step 5: Solve for x
    x = 245,062,388,500.16/618,904.48
  6. Step 6: Final answer
    x = 395,961.57

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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.