Home / 643,318.39-887,885.86-356,930.74

Finding the Fourth Proportional to 643,318.39, 887,885.86 and 356,930.74

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Solution

The fourth proportional to 643,318.39, 887,885.86 and 356,930.74 is: 492,623.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,318.39 : 887,885.86 = 356,930.74 : x
  2. Step 2: Convert to fraction form
    643,318.39/887,885.86 = 356,930.74/x
  3. Step 3: Cross multiply
    643,318.39x = 887,885.86 × 356,930.74
  4. Step 4: Simplify right side
    643,318.39x = 316,913,758,372.72
  5. Step 5: Solve for x
    x = 316,913,758,372.72/643,318.39
  6. Step 6: Final answer
    x = 492,623.50

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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.