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Finding the Fourth Proportional to 388,876.42, 536,649.54 and 210,028.42

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Solution

The fourth proportional to 388,876.42, 536,649.54 and 210,028.42 is: 289,839.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,876.42 : 536,649.54 = 210,028.42 : x
  2. Step 2: Convert to fraction form
    388,876.42/536,649.54 = 210,028.42/x
  3. Step 3: Cross multiply
    388,876.42x = 536,649.54 × 210,028.42
  4. Step 4: Simplify right side
    388,876.42x = 112,711,654,979.93
  5. Step 5: Solve for x
    x = 112,711,654,979.93/388,876.42
  6. Step 6: Final answer
    x = 289,839.26

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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.