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Finding the Fourth Proportional to 719,836,975.36, 993,375,984 and 389,812,683.52

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Solution

The fourth proportional to 719,836,975.36, 993,375,984 and 389,812,683.52 is: 537,942,022.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,836,975.36 : 993,375,984 = 389,812,683.52 : x
  2. Step 2: Convert to fraction form
    719,836,975.36/993,375,984 = 389,812,683.52/x
  3. Step 3: Cross multiply
    719,836,975.36x = 993,375,984 × 389,812,683.52
  4. Step 4: Simplify right side
    719,836,975.36x = 387,230,558,067,360,576
  5. Step 5: Solve for x
    x = 387,230,558,067,360,576/719,836,975.36
  6. Step 6: Final answer
    x = 537,942,022.04

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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.