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Finding the Fourth Proportional to 721,881.54, 996,184.46 and 399,584.74

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Solution

The fourth proportional to 721,881.54, 996,184.46 and 399,584.74 is: 551,420.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,881.54 : 996,184.46 = 399,584.74 : x
  2. Step 2: Convert to fraction form
    721,881.54/996,184.46 = 399,584.74/x
  3. Step 3: Cross multiply
    721,881.54x = 996,184.46 × 399,584.74
  4. Step 4: Simplify right side
    721,881.54x = 398,060,108,441.14
  5. Step 5: Solve for x
    x = 398,060,108,441.14/721,881.54
  6. Step 6: Final answer
    x = 551,420.26

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Double scale
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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.