Home / 643,424.72-887,927.15-356,944.80

Finding the Fourth Proportional to 643,424.72, 887,927.15 and 356,944.80

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Solution

The fourth proportional to 643,424.72, 887,927.15 and 356,944.80 is: 492,584.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,424.72 : 887,927.15 = 356,944.80 : x
  2. Step 2: Convert to fraction form
    643,424.72/887,927.15 = 356,944.80/x
  3. Step 3: Cross multiply
    643,424.72x = 887,927.15 × 356,944.80
  4. Step 4: Simplify right side
    643,424.72x = 316,940,983,193.41
  5. Step 5: Solve for x
    x = 316,940,983,193.41/643,424.72
  6. Step 6: Final answer
    x = 492,584.41

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1.5x scale

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.