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Finding the Fourth Proportional to 388,357.68, 536,099.43 and 261,107.07

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Solution

The fourth proportional to 388,357.68, 536,099.43 and 261,107.07 is: 360,439.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,357.68 : 536,099.43 = 261,107.07 : x
  2. Step 2: Convert to fraction form
    388,357.68/536,099.43 = 261,107.07/x
  3. Step 3: Cross multiply
    388,357.68x = 536,099.43 × 261,107.07
  4. Step 4: Simplify right side
    388,357.68x = 139,979,351,395.97
  5. Step 5: Solve for x
    x = 139,979,351,395.97/388,357.68
  6. Step 6: Final answer
    x = 360,439.25

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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.