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Finding the Fourth Proportional to 388,442.52, 536,060.70 and 218,682.72

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Solution

The fourth proportional to 388,442.52, 536,060.70 and 218,682.72 is: 301,787.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,442.52 : 536,060.70 = 218,682.72 : x
  2. Step 2: Convert to fraction form
    388,442.52/536,060.70 = 218,682.72/x
  3. Step 3: Cross multiply
    388,442.52x = 536,060.70 × 218,682.72
  4. Step 4: Simplify right side
    388,442.52x = 117,227,211,961.10
  5. Step 5: Solve for x
    x = 117,227,211,961.10/388,442.52
  6. Step 6: Final answer
    x = 301,787.80

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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.