Home / 643,427.72-887,931.30-356,947.80

Finding the Fourth Proportional to 643,427.72, 887,931.30 and 356,947.80

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Solution

The fourth proportional to 643,427.72, 887,931.30 and 356,947.80 is: 492,588.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,427.72 : 887,931.30 = 356,947.80 : x
  2. Step 2: Convert to fraction form
    643,427.72/887,931.30 = 356,947.80/x
  3. Step 3: Cross multiply
    643,427.72x = 887,931.30 × 356,947.80
  4. Step 4: Simplify right side
    643,427.72x = 316,945,124,086.14
  5. Step 5: Solve for x
    x = 316,945,124,086.14/643,427.72
  6. Step 6: Final answer
    x = 492,588.54

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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.