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Finding the Fourth Proportional to 7,240,998.76, 9,992,584.85 and 3,978,024.87

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Solution

The fourth proportional to 7,240,998.76, 9,992,584.85 and 3,978,024.87 is: 5,489,677.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,240,998.76 : 9,992,584.85 = 3,978,024.87 : x
  2. Step 2: Convert to fraction form
    7,240,998.76/9,992,584.85 = 3,978,024.87/x
  3. Step 3: Cross multiply
    7,240,998.76x = 9,992,584.85 × 3,978,024.87
  4. Step 4: Simplify right side
    7,240,998.76x = 39,750,750,979,032.18
  5. Step 5: Solve for x
    x = 39,750,750,979,032.18/7,240,998.76
  6. Step 6: Final answer
    x = 5,489,677.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.