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Finding the Fourth Proportional to 2,547,904.40, 3,821,856.60 and 865,007.90

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Solution

The fourth proportional to 2,547,904.40, 3,821,856.60 and 865,007.90 is: 1,297,511.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547,904.40 : 3,821,856.60 = 865,007.90 : x
  2. Step 2: Convert to fraction form
    2,547,904.40/3,821,856.60 = 865,007.90/x
  3. Step 3: Cross multiply
    2,547,904.40x = 3,821,856.60 × 865,007.90
  4. Step 4: Simplify right side
    2,547,904.40x = 3,305,936,151,667.14
  5. Step 5: Solve for x
    x = 3,305,936,151,667.14/2,547,904.40
  6. Step 6: Final answer
    x = 1,297,511.85

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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.