Home / 643,425.59-887,928.36-356,945.69

Finding the Fourth Proportional to 643,425.59, 887,928.36 and 356,945.69

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Solution

The fourth proportional to 643,425.59, 887,928.36 and 356,945.69 is: 492,585.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,425.59 : 887,928.36 = 356,945.69 : x
  2. Step 2: Convert to fraction form
    643,425.59/887,928.36 = 356,945.69/x
  3. Step 3: Cross multiply
    643,425.59x = 887,928.36 × 356,945.69
  4. Step 4: Simplify right side
    643,425.59x = 316,942,196,691.13
  5. Step 5: Solve for x
    x = 316,942,196,691.13/643,425.59
  6. Step 6: Final answer
    x = 492,585.63

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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.