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Finding the Fourth Proportional to 858,845.40, 1,285,643.70 and 858,845.40

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Solution

The fourth proportional to 858,845.40, 1,285,643.70 and 858,845.40 is: 1,285,643.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,845.40 : 1,285,643.70 = 858,845.40 : x
  2. Step 2: Convert to fraction form
    858,845.40/1,285,643.70 = 858,845.40/x
  3. Step 3: Cross multiply
    858,845.40x = 1,285,643.70 × 858,845.40
  4. Step 4: Simplify right side
    858,845.40x = 1,104,169,177,783.98
  5. Step 5: Solve for x
    x = 1,104,169,177,783.98/858,845.40
  6. Step 6: Final answer
    x = 1,285,643.70

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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.