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Finding the Fourth Proportional to 721,982.79, 996,304.86 and 399,673.67

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Solution

The fourth proportional to 721,982.79, 996,304.86 and 399,673.67 is: 551,532.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,982.79 : 996,304.86 = 399,673.67 : x
  2. Step 2: Convert to fraction form
    721,982.79/996,304.86 = 399,673.67/x
  3. Step 3: Cross multiply
    721,982.79x = 996,304.86 × 399,673.67
  4. Step 4: Simplify right side
    721,982.79x = 398,196,814,853.51
  5. Step 5: Solve for x
    x = 398,196,814,853.51/721,982.79
  6. Step 6: Final answer
    x = 551,532.28

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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.