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Finding the Fourth Proportional to 677,438.52, 934,942.14 and 391,035.48

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Solution

The fourth proportional to 677,438.52, 934,942.14 and 391,035.48 is: 539,673.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,438.52 : 934,942.14 = 391,035.48 : x
  2. Step 2: Convert to fraction form
    677,438.52/934,942.14 = 391,035.48/x
  3. Step 3: Cross multiply
    677,438.52x = 934,942.14 × 391,035.48
  4. Step 4: Simplify right side
    677,438.52x = 365,595,548,487.13
  5. Step 5: Solve for x
    x = 365,595,548,487.13/677,438.52
  6. Step 6: Final answer
    x = 539,673.40

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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.