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Finding the Fourth Proportional to 722,084.60, 996,513.58 and 399,830.28

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Solution

The fourth proportional to 722,084.60, 996,513.58 and 399,830.28 is: 551,786.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,084.60 : 996,513.58 = 399,830.28 : x
  2. Step 2: Convert to fraction form
    722,084.60/996,513.58 = 399,830.28/x
  3. Step 3: Cross multiply
    722,084.60x = 996,513.58 × 399,830.28
  4. Step 4: Simplify right side
    722,084.60x = 398,436,303,715.20
  5. Step 5: Solve for x
    x = 398,436,303,715.20/722,084.60
  6. Step 6: Final answer
    x = 551,786.18

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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.