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Finding the Fourth Proportional to 388,835.88, 536,593.53 and 209,987.88

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Solution

The fourth proportional to 388,835.88, 536,593.53 and 209,987.88 is: 289,783.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,835.88 : 536,593.53 = 209,987.88 : x
  2. Step 2: Convert to fraction form
    388,835.88/536,593.53 = 209,987.88/x
  3. Step 3: Cross multiply
    388,835.88x = 536,593.53 × 209,987.88
  4. Step 4: Simplify right side
    388,835.88x = 112,678,137,786.42
  5. Step 5: Solve for x
    x = 112,678,137,786.42/388,835.88
  6. Step 6: Final answer
    x = 289,783.28

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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.