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Finding the Fourth Proportional to 1,299,666.07, 1,949,504.57 and 853,211.89

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Solution

The fourth proportional to 1,299,666.07, 1,949,504.57 and 853,211.89 is: 1,279,821.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299,666.07 : 1,949,504.57 = 853,211.89 : x
  2. Step 2: Convert to fraction form
    1,299,666.07/1,949,504.57 = 853,211.89/x
  3. Step 3: Cross multiply
    1,299,666.07x = 1,949,504.57 × 853,211.89
  4. Step 4: Simplify right side
    1,299,666.07x = 1,663,340,464,719.76
  5. Step 5: Solve for x
    x = 1,663,340,464,719.76/1,299,666.07
  6. Step 6: Final answer
    x = 1,279,821.42

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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.