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Finding the Fourth Proportional to 660,353.61, 990,481.99 and 210,953.82

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Solution

The fourth proportional to 660,353.61, 990,481.99 and 210,953.82 is: 316,415.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,353.61 : 990,481.99 = 210,953.82 : x
  2. Step 2: Convert to fraction form
    660,353.61/990,481.99 = 210,953.82/x
  3. Step 3: Cross multiply
    660,353.61x = 990,481.99 × 210,953.82
  4. Step 4: Simplify right side
    660,353.61x = 208,945,957,442.70
  5. Step 5: Solve for x
    x = 208,945,957,442.70/660,353.61
  6. Step 6: Final answer
    x = 316,415.26

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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.