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Finding the Fourth Proportional to 861,238.42, 1,188,720.03 and 667,262.50

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Solution

The fourth proportional to 861,238.42, 1,188,720.03 and 667,262.50 is: 920,985.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,238.42 : 1,188,720.03 = 667,262.50 : x
  2. Step 2: Convert to fraction form
    861,238.42/1,188,720.03 = 667,262.50/x
  3. Step 3: Cross multiply
    861,238.42x = 1,188,720.03 × 667,262.50
  4. Step 4: Simplify right side
    861,238.42x = 793,188,299,017.88
  5. Step 5: Solve for x
    x = 793,188,299,017.88/861,238.42
  6. Step 6: Final answer
    x = 920,985.73

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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.