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Finding the Fourth Proportional to 865,863.90, 1,298,795.85 and 865,863.90

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Solution

The fourth proportional to 865,863.90, 1,298,795.85 and 865,863.90 is: 1,298,795.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,863.90 : 1,298,795.85 = 865,863.90 : x
  2. Step 2: Convert to fraction form
    865,863.90/1,298,795.85 = 865,863.90/x
  3. Step 3: Cross multiply
    865,863.90x = 1,298,795.85 × 865,863.90
  4. Step 4: Simplify right side
    865,863.90x = 1,124,580,439,984.82
  5. Step 5: Solve for x
    x = 1,124,580,439,984.82/865,863.90
  6. Step 6: Final answer
    x = 1,298,795.85

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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.