Home / 643,333.18-887,906.22-356,945.53

Finding the Fourth Proportional to 643,333.18, 887,906.22 and 356,945.53

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Solution

The fourth proportional to 643,333.18, 887,906.22 and 356,945.53 is: 492,643.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,333.18 : 887,906.22 = 356,945.53 : x
  2. Step 2: Convert to fraction form
    643,333.18/887,906.22 = 356,945.53/x
  3. Step 3: Cross multiply
    643,333.18x = 887,906.22 × 356,945.53
  4. Step 4: Simplify right side
    643,333.18x = 316,934,151,848.67
  5. Step 5: Solve for x
    x = 316,934,151,848.67/643,333.18
  6. Step 6: Final answer
    x = 492,643.88

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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.