Home / 643,023.72-887,383.38-356,555.88

Finding the Fourth Proportional to 643,023.72, 887,383.38 and 356,555.88

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Solution

The fourth proportional to 643,023.72, 887,383.38 and 356,555.88 is: 492,053.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,023.72 : 887,383.38 = 356,555.88 : x
  2. Step 2: Convert to fraction form
    643,023.72/887,383.38 = 356,555.88/x
  3. Step 3: Cross multiply
    643,023.72x = 887,383.38 × 356,555.88
  4. Step 4: Simplify right side
    643,023.72x = 316,401,761,953.27
  5. Step 5: Solve for x
    x = 316,401,761,953.27/643,023.72
  6. Step 6: Final answer
    x = 492,053.02

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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.