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Finding the Fourth Proportional to 521,896.60, 720,205.09 and 307,050.48

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Solution

The fourth proportional to 521,896.60, 720,205.09 and 307,050.48 is: 423,722.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,896.60 : 720,205.09 = 307,050.48 : x
  2. Step 2: Convert to fraction form
    521,896.60/720,205.09 = 307,050.48/x
  3. Step 3: Cross multiply
    521,896.60x = 720,205.09 × 307,050.48
  4. Step 4: Simplify right side
    521,896.60x = 221,139,317,815.32
  5. Step 5: Solve for x
    x = 221,139,317,815.32/521,896.60
  6. Step 6: Final answer
    x = 423,722.47

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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.