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Finding the Fourth Proportional to 919,216.80, 1,377,658.80 and 818,906.40

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Solution

The fourth proportional to 919,216.80, 1,377,658.80 and 818,906.40 is: 1,227,320.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,216.80 : 1,377,658.80 = 818,906.40 : x
  2. Step 2: Convert to fraction form
    919,216.80/1,377,658.80 = 818,906.40/x
  3. Step 3: Cross multiply
    919,216.80x = 1,377,658.80 × 818,906.40
  4. Step 4: Simplify right side
    919,216.80x = 1,128,173,608,336.32
  5. Step 5: Solve for x
    x = 1,128,173,608,336.32/919,216.80
  6. Step 6: Final answer
    x = 1,227,320.48

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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.