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Finding the Fourth Proportional to 388,830.88, 536,586.61 and 209,982.88

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Solution

The fourth proportional to 388,830.88, 536,586.61 and 209,982.88 is: 289,776.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,830.88 : 536,586.61 = 209,982.88 : x
  2. Step 2: Convert to fraction form
    388,830.88/536,586.61 = 209,982.88/x
  3. Step 3: Cross multiply
    388,830.88x = 536,586.61 × 209,982.88
  4. Step 4: Simplify right side
    388,830.88x = 112,674,001,737.24
  5. Step 5: Solve for x
    x = 112,674,001,737.24/388,830.88
  6. Step 6: Final answer
    x = 289,776.37

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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.