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Finding the Fourth Proportional to 388,816.59, 536,598.02 and 216,790.31

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Solution

The fourth proportional to 388,816.59, 536,598.02 and 216,790.31 is: 299,187.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,816.59 : 536,598.02 = 216,790.31 : x
  2. Step 2: Convert to fraction form
    388,816.59/536,598.02 = 216,790.31/x
  3. Step 3: Cross multiply
    388,816.59x = 536,598.02 × 216,790.31
  4. Step 4: Simplify right side
    388,816.59x = 116,329,247,334.25
  5. Step 5: Solve for x
    x = 116,329,247,334.25/388,816.59
  6. Step 6: Final answer
    x = 299,187.97

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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.