Home / 643,427.09-887,930.43-356,947.18

Finding the Fourth Proportional to 643,427.09, 887,930.43 and 356,947.18

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Solution

The fourth proportional to 643,427.09, 887,930.43 and 356,947.18 is: 492,587.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,427.09 : 887,930.43 = 356,947.18 : x
  2. Step 2: Convert to fraction form
    643,427.09/887,930.43 = 356,947.18/x
  3. Step 3: Cross multiply
    643,427.09x = 887,930.43 × 356,947.18
  4. Step 4: Simplify right side
    643,427.09x = 316,944,263,024.69
  5. Step 5: Solve for x
    x = 316,944,263,024.69/643,427.09
  6. Step 6: Final answer
    x = 492,587.69

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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.