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Finding the Fourth Proportional to 722,122.71, 996,585.45 and 399,862.80

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Solution

The fourth proportional to 722,122.71, 996,585.45 and 399,862.80 is: 551,841.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,122.71 : 996,585.45 = 399,862.80 : x
  2. Step 2: Convert to fraction form
    722,122.71/996,585.45 = 399,862.80/x
  3. Step 3: Cross multiply
    722,122.71x = 996,585.45 × 399,862.80
  4. Step 4: Simplify right side
    722,122.71x = 398,497,448,476.26
  5. Step 5: Solve for x
    x = 398,497,448,476.26/722,122.71
  6. Step 6: Final answer
    x = 551,841.73

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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.