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Finding the Fourth Proportional to 905,216.40, 1,270,845.90 and 905,216.40

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Solution

The fourth proportional to 905,216.40, 1,270,845.90 and 905,216.40 is: 1,270,845.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,216.40 : 1,270,845.90 = 905,216.40 : x
  2. Step 2: Convert to fraction form
    905,216.40/1,270,845.90 = 905,216.40/x
  3. Step 3: Cross multiply
    905,216.40x = 1,270,845.90 × 905,216.40
  4. Step 4: Simplify right side
    905,216.40x = 1,150,390,550,552.76
  5. Step 5: Solve for x
    x = 1,150,390,550,552.76/905,216.40
  6. Step 6: Final answer
    x = 1,270,845.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.