Home / 645,925.05-891,372.20-355,553.82

Finding the Fourth Proportional to 645,925.05, 891,372.20 and 355,553.82

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Solution

The fourth proportional to 645,925.05, 891,372.20 and 355,553.82 is: 490,661.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,925.05 : 891,372.20 = 355,553.82 : x
  2. Step 2: Convert to fraction form
    645,925.05/891,372.20 = 355,553.82/x
  3. Step 3: Cross multiply
    645,925.05x = 891,372.20 × 355,553.82
  4. Step 4: Simplify right side
    645,925.05x = 316,930,788,974.04
  5. Step 5: Solve for x
    x = 316,930,788,974.04/645,925.05
  6. Step 6: Final answer
    x = 490,661.86

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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.