Home / 284,865.09-393,120.68-155,815.69

Finding the Fourth Proportional to 284,865.09, 393,120.68 and 155,815.69

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Solution

The fourth proportional to 284,865.09, 393,120.68 and 155,815.69 is: 215,029.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,865.09 : 393,120.68 = 155,815.69 : x
  2. Step 2: Convert to fraction form
    284,865.09/393,120.68 = 155,815.69/x
  3. Step 3: Cross multiply
    284,865.09x = 393,120.68 × 155,815.69
  4. Step 4: Simplify right side
    284,865.09x = 61,254,368,245.59
  5. Step 5: Solve for x
    x = 61,254,368,245.59/284,865.09
  6. Step 6: Final answer
    x = 215,029.40

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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.