Home / 643,318.77-887,886.38-356,931.12

Finding the Fourth Proportional to 643,318.77, 887,886.38 and 356,931.12

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Solution

The fourth proportional to 643,318.77, 887,886.38 and 356,931.12 is: 492,624.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,318.77 : 887,886.38 = 356,931.12 : x
  2. Step 2: Convert to fraction form
    643,318.77/887,886.38 = 356,931.12/x
  3. Step 3: Cross multiply
    643,318.77x = 887,886.38 × 356,931.12
  4. Step 4: Simplify right side
    643,318.77x = 316,914,278,261.49
  5. Step 5: Solve for x
    x = 316,914,278,261.49/643,318.77
  6. Step 6: Final answer
    x = 492,624.02

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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.