Home / 643,129.42-887,513.60-356,650.24

Finding the Fourth Proportional to 643,129.42, 887,513.60 and 356,650.24

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Solution

The fourth proportional to 643,129.42, 887,513.60 and 356,650.24 is: 492,174.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,129.42 : 887,513.60 = 356,650.24 : x
  2. Step 2: Convert to fraction form
    643,129.42/887,513.60 = 356,650.24/x
  3. Step 3: Cross multiply
    643,129.42x = 887,513.60 × 356,650.24
  4. Step 4: Simplify right side
    643,129.42x = 316,531,938,443.26
  5. Step 5: Solve for x
    x = 316,531,938,443.26/643,129.42
  6. Step 6: Final answer
    x = 492,174.56

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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.