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Finding the Fourth Proportional to 858,906.40, 1,286,804.40 and 734,490.40

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Solution

The fourth proportional to 858,906.40, 1,286,804.40 and 734,490.40 is: 1,100,405.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,906.40 : 1,286,804.40 = 734,490.40 : x
  2. Step 2: Convert to fraction form
    858,906.40/1,286,804.40 = 734,490.40/x
  3. Step 3: Cross multiply
    858,906.40x = 1,286,804.40 × 734,490.40
  4. Step 4: Simplify right side
    858,906.40x = 945,145,478,477.76
  5. Step 5: Solve for x
    x = 945,145,478,477.76/858,906.40
  6. Step 6: Final answer
    x = 1,100,405.68

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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.