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Finding the Fourth Proportional to 388,424.63, 536,004.78 and 213,960.65

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Solution

The fourth proportional to 388,424.63, 536,004.78 and 213,960.65 is: 295,254.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,424.63 : 536,004.78 = 213,960.65 : x
  2. Step 2: Convert to fraction form
    388,424.63/536,004.78 = 213,960.65/x
  3. Step 3: Cross multiply
    388,424.63x = 536,004.78 × 213,960.65
  4. Step 4: Simplify right side
    388,424.63x = 114,683,928,451.88
  5. Step 5: Solve for x
    x = 114,683,928,451.88/388,424.63
  6. Step 6: Final answer
    x = 295,254.01

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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.