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Finding the Fourth Proportional to 722,109.84, 996,519.52 and 399,825.60

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Solution

The fourth proportional to 722,109.84, 996,519.52 and 399,825.60 is: 551,763.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,109.84 : 996,519.52 = 399,825.60 : x
  2. Step 2: Convert to fraction form
    722,109.84/996,519.52 = 399,825.60/x
  3. Step 3: Cross multiply
    722,109.84x = 996,519.52 × 399,825.60
  4. Step 4: Simplify right side
    722,109.84x = 398,434,014,995.71
  5. Step 5: Solve for x
    x = 398,434,014,995.71/722,109.84
  6. Step 6: Final answer
    x = 551,763.72

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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.