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Finding the Fourth Proportional to 356,940.90, 535,886.52 and 207,288.60

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Solution

The fourth proportional to 356,940.90, 535,886.52 and 207,288.60 is: 311,208.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,940.90 : 535,886.52 = 207,288.60 : x
  2. Step 2: Convert to fraction form
    356,940.90/535,886.52 = 207,288.60/x
  3. Step 3: Cross multiply
    356,940.90x = 535,886.52 × 207,288.60
  4. Step 4: Simplify right side
    356,940.90x = 111,083,166,489.67
  5. Step 5: Solve for x
    x = 111,083,166,489.67/356,940.90
  6. Step 6: Final answer
    x = 311,208.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.