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Finding the Fourth Proportional to 509,173.38, 702,659.54 and 279,745.46

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Solution

The fourth proportional to 509,173.38, 702,659.54 and 279,745.46 is: 386,048.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,173.38 : 702,659.54 = 279,745.46 : x
  2. Step 2: Convert to fraction form
    509,173.38/702,659.54 = 279,745.46/x
  3. Step 3: Cross multiply
    509,173.38x = 702,659.54 × 279,745.46
  4. Step 4: Simplify right side
    509,173.38x = 196,565,811,328.66
  5. Step 5: Solve for x
    x = 196,565,811,328.66/509,173.38
  6. Step 6: Final answer
    x = 386,048.88

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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.