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Finding the Fourth Proportional to 509,358.90, 702,927.87 and 279,914.46

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Solution

The fourth proportional to 509,358.90, 702,927.87 and 279,914.46 is: 386,288.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,358.90 : 702,927.87 = 279,914.46 : x
  2. Step 2: Convert to fraction form
    509,358.90/702,927.87 = 279,914.46/x
  3. Step 3: Cross multiply
    509,358.90x = 702,927.87 × 279,914.46
  4. Step 4: Simplify right side
    509,358.90x = 196,759,675,150.00
  5. Step 5: Solve for x
    x = 196,759,675,150.00/509,358.90
  6. Step 6: Final answer
    x = 386,288.87

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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.