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Finding the Fourth Proportional to 388,975.56, 536,783.40 and 219,264.36

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Solution

The fourth proportional to 388,975.56, 536,783.40 and 219,264.36 is: 302,583.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,975.56 : 536,783.40 = 219,264.36 : x
  2. Step 2: Convert to fraction form
    388,975.56/536,783.40 = 219,264.36/x
  3. Step 3: Cross multiply
    388,975.56x = 536,783.40 × 219,264.36
  4. Step 4: Simplify right side
    388,975.56x = 117,697,468,659.62
  5. Step 5: Solve for x
    x = 117,697,468,659.62/388,975.56
  6. Step 6: Final answer
    x = 302,583.20

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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.