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Finding the Fourth Proportional to 1,098,890.80, 1,648,627.80 and 388,844.80

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Solution

The fourth proportional to 1,098,890.80, 1,648,627.80 and 388,844.80 is: 583,370.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098,890.80 : 1,648,627.80 = 388,844.80 : x
  2. Step 2: Convert to fraction form
    1,098,890.80/1,648,627.80 = 388,844.80/x
  3. Step 3: Cross multiply
    1,098,890.80x = 1,648,627.80 × 388,844.80
  4. Step 4: Simplify right side
    1,098,890.80x = 641,060,347,165.44
  5. Step 5: Solve for x
    x = 641,060,347,165.44/1,098,890.80
  6. Step 6: Final answer
    x = 583,370.38

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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.