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Finding the Fourth Proportional to 1,028,751.21, 1,536,869.80 and 665,966.61

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Solution

The fourth proportional to 1,028,751.21, 1,536,869.80 and 665,966.61 is: 994,899.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028,751.21 : 1,536,869.80 = 665,966.61 : x
  2. Step 2: Convert to fraction form
    1,028,751.21/1,536,869.80 = 665,966.61/x
  3. Step 3: Cross multiply
    1,028,751.21x = 1,536,869.80 × 665,966.61
  4. Step 4: Simplify right side
    1,028,751.21x = 1,023,503,964,697.95
  5. Step 5: Solve for x
    x = 1,023,503,964,697.95/1,028,751.21
  6. Step 6: Final answer
    x = 994,899.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.