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Finding the Fourth Proportional to 717,848, 990,650.72 and 399,916.48

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Solution

The fourth proportional to 717,848, 990,650.72 and 399,916.48 is: 551,896.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,848 : 990,650.72 = 399,916.48 : x
  2. Step 2: Convert to fraction form
    717,848/990,650.72 = 399,916.48/x
  3. Step 3: Cross multiply
    717,848x = 990,650.72 × 399,916.48
  4. Step 4: Simplify right side
    717,848x = 396,177,548,851.87
  5. Step 5: Solve for x
    x = 396,177,548,851.87/717,848
  6. Step 6: Final answer
    x = 551,896.15

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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.