Home / 285,245.10-393,218.91-217,143.36

Finding the Fourth Proportional to 285,245.10, 393,218.91 and 217,143.36

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Solution

The fourth proportional to 285,245.10, 393,218.91 and 217,143.36 is: 299,338.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,245.10 : 393,218.91 = 217,143.36 : x
  2. Step 2: Convert to fraction form
    285,245.10/393,218.91 = 217,143.36/x
  3. Step 3: Cross multiply
    285,245.10x = 393,218.91 × 217,143.36
  4. Step 4: Simplify right side
    285,245.10x = 85,384,875,332.94
  5. Step 5: Solve for x
    x = 85,384,875,332.94/285,245.10
  6. Step 6: Final answer
    x = 299,338.62

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1.5x scale

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.