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Finding the Fourth Proportional to 722,095.69, 996,523.20 and 399,805.78

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Solution

The fourth proportional to 722,095.69, 996,523.20 and 399,805.78 is: 551,749.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,095.69 : 996,523.20 = 399,805.78 : x
  2. Step 2: Convert to fraction form
    722,095.69/996,523.20 = 399,805.78/x
  3. Step 3: Cross multiply
    722,095.69x = 996,523.20 × 399,805.78
  4. Step 4: Simplify right side
    722,095.69x = 398,415,735,264.10
  5. Step 5: Solve for x
    x = 398,415,735,264.10/722,095.69
  6. Step 6: Final answer
    x = 551,749.22

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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.