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Finding the Fourth Proportional to 865,458.48, 1,298,310.57 and 266,469.42

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Solution

The fourth proportional to 865,458.48, 1,298,310.57 and 266,469.42 is: 399,741.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,458.48 : 1,298,310.57 = 266,469.42 : x
  2. Step 2: Convert to fraction form
    865,458.48/1,298,310.57 = 266,469.42/x
  3. Step 3: Cross multiply
    865,458.48x = 1,298,310.57 × 266,469.42
  4. Step 4: Simplify right side
    865,458.48x = 345,960,064,567.77
  5. Step 5: Solve for x
    x = 345,960,064,567.77/865,458.48
  6. Step 6: Final answer
    x = 399,741.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.