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Finding the Fourth Proportional to 358,661.92, 494,930.64 and 215,428

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Solution

The fourth proportional to 358,661.92, 494,930.64 and 215,428 is: 297,276.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,661.92 : 494,930.64 = 215,428 : x
  2. Step 2: Convert to fraction form
    358,661.92/494,930.64 = 215,428/x
  3. Step 3: Cross multiply
    358,661.92x = 494,930.64 × 215,428
  4. Step 4: Simplify right side
    358,661.92x = 106,621,917,913.92
  5. Step 5: Solve for x
    x = 106,621,917,913.92/358,661.92
  6. Step 6: Final answer
    x = 297,276.94

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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.