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Finding the Fourth Proportional to 306,696.81, 423,211.90 and 226,167.69

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Solution

The fourth proportional to 306,696.81, 423,211.90 and 226,167.69 is: 312,089.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,696.81 : 423,211.90 = 226,167.69 : x
  2. Step 2: Convert to fraction form
    306,696.81/423,211.90 = 226,167.69/x
  3. Step 3: Cross multiply
    306,696.81x = 423,211.90 × 226,167.69
  4. Step 4: Simplify right side
    306,696.81x = 95,716,857,803.51
  5. Step 5: Solve for x
    x = 95,716,857,803.51/306,696.81
  6. Step 6: Final answer
    x = 312,089.51

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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.