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Finding the Fourth Proportional to 665,172.73, 998,007 and 399,124.18

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Solution

The fourth proportional to 665,172.73, 998,007 and 399,124.18 is: 598,835.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,172.73 : 998,007 = 399,124.18 : x
  2. Step 2: Convert to fraction form
    665,172.73/998,007 = 399,124.18/x
  3. Step 3: Cross multiply
    665,172.73x = 998,007 × 399,124.18
  4. Step 4: Simplify right side
    665,172.73x = 398,328,725,509.26
  5. Step 5: Solve for x
    x = 398,328,725,509.26/665,172.73
  6. Step 6: Final answer
    x = 598,835.02

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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.