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Finding the Fourth Proportional to 388,836.88, 536,594.91 and 209,988.88

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Solution

The fourth proportional to 388,836.88, 536,594.91 and 209,988.88 is: 289,784.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,836.88 : 536,594.91 = 209,988.88 : x
  2. Step 2: Convert to fraction form
    388,836.88/536,594.91 = 209,988.88/x
  3. Step 3: Cross multiply
    388,836.88x = 536,594.91 × 209,988.88
  4. Step 4: Simplify right side
    388,836.88x = 112,678,964,164.60
  5. Step 5: Solve for x
    x = 112,678,964,164.60/388,836.88
  6. Step 6: Final answer
    x = 289,784.66

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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.