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Finding the Fourth Proportional to 525,800.87, 725,639.40 and 305,083.36

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Solution

The fourth proportional to 525,800.87, 725,639.40 and 305,083.36 is: 421,034.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,800.87 : 725,639.40 = 305,083.36 : x
  2. Step 2: Convert to fraction form
    525,800.87/725,639.40 = 305,083.36/x
  3. Step 3: Cross multiply
    525,800.87x = 725,639.40 × 305,083.36
  4. Step 4: Simplify right side
    525,800.87x = 221,380,501,146.77
  5. Step 5: Solve for x
    x = 221,380,501,146.77/525,800.87
  6. Step 6: Final answer
    x = 421,034.87

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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.