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Finding the Fourth Proportional to 739,504, 1,020,515.88 and 399,972.16

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Solution

The fourth proportional to 739,504, 1,020,515.88 and 399,972.16 is: 551,961.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,504 : 1,020,515.88 = 399,972.16 : x
  2. Step 2: Convert to fraction form
    739,504/1,020,515.88 = 399,972.16/x
  3. Step 3: Cross multiply
    739,504x = 1,020,515.88 × 399,972.16
  4. Step 4: Simplify right side
    739,504x = 408,177,940,837.90
  5. Step 5: Solve for x
    x = 408,177,940,837.90/739,504
  6. Step 6: Final answer
    x = 551,961.78

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1.5x scale

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.