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Finding the Fourth Proportional to 637,115.67, 879,021.71 and 361,428.15

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Solution

The fourth proportional to 637,115.67, 879,021.71 and 361,428.15 is: 498,658.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,115.67 : 879,021.71 = 361,428.15 : x
  2. Step 2: Convert to fraction form
    637,115.67/879,021.71 = 361,428.15/x
  3. Step 3: Cross multiply
    637,115.67x = 879,021.71 × 361,428.15
  4. Step 4: Simplify right side
    637,115.67x = 317,703,192,369.46
  5. Step 5: Solve for x
    x = 317,703,192,369.46/637,115.67
  6. Step 6: Final answer
    x = 498,658.57

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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.