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Finding the Fourth Proportional to 722,212.60, 996,641.16 and 399,915.80

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Solution

The fourth proportional to 722,212.60, 996,641.16 and 399,915.80 is: 551,877.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,212.60 : 996,641.16 = 399,915.80 : x
  2. Step 2: Convert to fraction form
    722,212.60/996,641.16 = 399,915.80/x
  3. Step 3: Cross multiply
    722,212.60x = 996,641.16 × 399,915.80
  4. Step 4: Simplify right side
    722,212.60x = 398,572,546,814.33
  5. Step 5: Solve for x
    x = 398,572,546,814.33/722,212.60
  6. Step 6: Final answer
    x = 551,877.03

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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.