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Finding the Fourth Proportional to 387,574.98, 580,852.17 and 207,639.56

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Solution

The fourth proportional to 387,574.98, 580,852.17 and 207,639.56 is: 311,185.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,574.98 : 580,852.17 = 207,639.56 : x
  2. Step 2: Convert to fraction form
    387,574.98/580,852.17 = 207,639.56/x
  3. Step 3: Cross multiply
    387,574.98x = 580,852.17 × 207,639.56
  4. Step 4: Simplify right side
    387,574.98x = 120,607,886,099.58
  5. Step 5: Solve for x
    x = 120,607,886,099.58/387,574.98
  6. Step 6: Final answer
    x = 311,185.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.