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Finding the Fourth Proportional to 6,644,438.80, 9,966,658.20 and 3,774,657.40

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Solution

The fourth proportional to 6,644,438.80, 9,966,658.20 and 3,774,657.40 is: 5,661,986.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,644,438.80 : 9,966,658.20 = 3,774,657.40 : x
  2. Step 2: Convert to fraction form
    6,644,438.80/9,966,658.20 = 3,774,657.40/x
  3. Step 3: Cross multiply
    6,644,438.80x = 9,966,658.20 × 3,774,657.40
  4. Step 4: Simplify right side
    6,644,438.80x = 37,620,720,127,900.68
  5. Step 5: Solve for x
    x = 37,620,720,127,900.68/6,644,438.80
  6. Step 6: Final answer
    x = 5,661,986.10

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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.