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Finding the Fourth Proportional to 692,914, 956,221.38 and 391,127.44

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Solution

The fourth proportional to 692,914, 956,221.38 and 391,127.44 is: 539,755.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,914 : 956,221.38 = 391,127.44 : x
  2. Step 2: Convert to fraction form
    692,914/956,221.38 = 391,127.44/x
  3. Step 3: Cross multiply
    692,914x = 956,221.38 × 391,127.44
  4. Step 4: Simplify right side
    692,914x = 374,004,420,432.67
  5. Step 5: Solve for x
    x = 374,004,420,432.67/692,914
  6. Step 6: Final answer
    x = 539,755.90

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1.5x scale

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.