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Finding the Fourth Proportional to 1,238,999.26, 1,709,922.03 and 687,766.85

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Solution

The fourth proportional to 1,238,999.26, 1,709,922.03 and 687,766.85 is: 949,175.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,999.26 : 1,709,922.03 = 687,766.85 : x
  2. Step 2: Convert to fraction form
    1,238,999.26/1,709,922.03 = 687,766.85/x
  3. Step 3: Cross multiply
    1,238,999.26x = 1,709,922.03 × 687,766.85
  4. Step 4: Simplify right side
    1,238,999.26x = 1,176,027,688,318.71
  5. Step 5: Solve for x
    x = 1,176,027,688,318.71/1,238,999.26
  6. Step 6: Final answer
    x = 949,175.46

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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.