Home / 643,286.34-887,154.03-401,591.16

Finding the Fourth Proportional to 643,286.34, 887,154.03 and 401,591.16

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Solution

The fourth proportional to 643,286.34, 887,154.03 and 401,591.16 is: 553,833.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,286.34 : 887,154.03 = 401,591.16 : x
  2. Step 2: Convert to fraction form
    643,286.34/887,154.03 = 401,591.16/x
  3. Step 3: Cross multiply
    643,286.34x = 887,154.03 × 401,591.16
  4. Step 4: Simplify right side
    643,286.34x = 356,273,216,006.38
  5. Step 5: Solve for x
    x = 356,273,216,006.38/643,286.34
  6. Step 6: Final answer
    x = 553,833.02

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Double scale
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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.