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Finding the Fourth Proportional to 719,984.79, 993,568.92 and 393,293.93

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Solution

The fourth proportional to 719,984.79, 993,568.92 and 393,293.93 is: 542,740.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,984.79 : 993,568.92 = 393,293.93 : x
  2. Step 2: Convert to fraction form
    719,984.79/993,568.92 = 393,293.93/x
  3. Step 3: Cross multiply
    719,984.79x = 993,568.92 × 393,293.93
  4. Step 4: Simplify right side
    719,984.79x = 390,764,620,304.81
  5. Step 5: Solve for x
    x = 390,764,620,304.81/719,984.79
  6. Step 6: Final answer
    x = 542,740.10

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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.