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Finding the Fourth Proportional to 875,906.40, 1,311,235.20 and 520,737.60

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Solution

The fourth proportional to 875,906.40, 1,311,235.20 and 520,737.60 is: 779,546.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,906.40 : 1,311,235.20 = 520,737.60 : x
  2. Step 2: Convert to fraction form
    875,906.40/1,311,235.20 = 520,737.60/x
  3. Step 3: Cross multiply
    875,906.40x = 1,311,235.20 × 520,737.60
  4. Step 4: Simplify right side
    875,906.40x = 682,809,471,083.52
  5. Step 5: Solve for x
    x = 682,809,471,083.52/875,906.40
  6. Step 6: Final answer
    x = 779,546.16

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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.