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Finding the Fourth Proportional to 1,265,728.38, 1,746,691.86 and 684,938.79

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Solution

The fourth proportional to 1,265,728.38, 1,746,691.86 and 684,938.79 is: 945,208.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265,728.38 : 1,746,691.86 = 684,938.79 : x
  2. Step 2: Convert to fraction form
    1,265,728.38/1,746,691.86 = 684,938.79/x
  3. Step 3: Cross multiply
    1,265,728.38x = 1,746,691.86 × 684,938.79
  4. Step 4: Simplify right side
    1,265,728.38x = 1,196,377,009,091.25
  5. Step 5: Solve for x
    x = 1,196,377,009,091.25/1,265,728.38
  6. Step 6: Final answer
    x = 945,208.33

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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.