Home / 667,927-921,742.50-399,655

Finding the Fourth Proportional to 667,927, 921,742.50 and 399,655

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Solution

The fourth proportional to 667,927, 921,742.50 and 399,655 is: 551,525.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,927 : 921,742.50 = 399,655 : x
  2. Step 2: Convert to fraction form
    667,927/921,742.50 = 399,655/x
  3. Step 3: Cross multiply
    667,927x = 921,742.50 × 399,655
  4. Step 4: Simplify right side
    667,927x = 368,378,998,837.50
  5. Step 5: Solve for x
    x = 368,378,998,837.50/667,927
  6. Step 6: Final answer
    x = 551,525.84

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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.