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Finding the Fourth Proportional to 397,386, 548,395.28 and 216,099.90

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Solution

The fourth proportional to 397,386, 548,395.28 and 216,099.90 is: 298,219.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,386 : 548,395.28 = 216,099.90 : x
  2. Step 2: Convert to fraction form
    397,386/548,395.28 = 216,099.90/x
  3. Step 3: Cross multiply
    397,386x = 548,395.28 × 216,099.90
  4. Step 4: Simplify right side
    397,386x = 118,508,164,087.97
  5. Step 5: Solve for x
    x = 118,508,164,087.97/397,386
  6. Step 6: Final answer
    x = 298,219.27

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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.