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Finding the Fourth Proportional to 721,818, 996,004.59 and 399,527.33

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Solution

The fourth proportional to 721,818, 996,004.59 and 399,527.33 is: 551,290.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,818 : 996,004.59 = 399,527.33 : x
  2. Step 2: Convert to fraction form
    721,818/996,004.59 = 399,527.33/x
  3. Step 3: Cross multiply
    721,818x = 996,004.59 × 399,527.33
  4. Step 4: Simplify right side
    721,818x = 397,931,049,530.42
  5. Step 5: Solve for x
    x = 397,931,049,530.42/721,818
  6. Step 6: Final answer
    x = 551,290.01

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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.