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Finding the Fourth Proportional to 388,289.87, 536,005.35 and 261,039.27

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Solution

The fourth proportional to 388,289.87, 536,005.35 and 261,039.27 is: 360,345.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,289.87 : 536,005.35 = 261,039.27 : x
  2. Step 2: Convert to fraction form
    388,289.87/536,005.35 = 261,039.27/x
  3. Step 3: Cross multiply
    388,289.87x = 536,005.35 × 261,039.27
  4. Step 4: Simplify right side
    388,289.87x = 139,918,445,280.09
  5. Step 5: Solve for x
    x = 139,918,445,280.09/388,289.87
  6. Step 6: Final answer
    x = 360,345.34

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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.