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Finding the Fourth Proportional to 6,865,978.76, 9,475,373.94 and 3,810,218.12

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Solution

The fourth proportional to 6,865,978.76, 9,475,373.94 and 3,810,218.12 is: 5,258,280.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,865,978.76 : 9,475,373.94 = 3,810,218.12 : x
  2. Step 2: Convert to fraction form
    6,865,978.76/9,475,373.94 = 3,810,218.12/x
  3. Step 3: Cross multiply
    6,865,978.76x = 9,475,373.94 × 3,810,218.12
  4. Step 4: Simplify right side
    6,865,978.76x = 36,103,241,479,963.79
  5. Step 5: Solve for x
    x = 36,103,241,479,963.79/6,865,978.76
  6. Step 6: Final answer
    x = 5,258,280.39

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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.