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Finding the Fourth Proportional to 521,279.46, 719,353.44 and 306,425.34

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Solution

The fourth proportional to 521,279.46, 719,353.44 and 306,425.34 is: 422,859.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,279.46 : 719,353.44 = 306,425.34 : x
  2. Step 2: Convert to fraction form
    521,279.46/719,353.44 = 306,425.34/x
  3. Step 3: Cross multiply
    521,279.46x = 719,353.44 × 306,425.34
  4. Step 4: Simplify right side
    521,279.46x = 220,428,122,432.17
  5. Step 5: Solve for x
    x = 220,428,122,432.17/521,279.46
  6. Step 6: Final answer
    x = 422,859.79

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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.