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Finding the Fourth Proportional to 660,295.74, 990,513 and 210,910.98

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Solution

The fourth proportional to 660,295.74, 990,513 and 210,910.98 is: 316,388.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,295.74 : 990,513 = 210,910.98 : x
  2. Step 2: Convert to fraction form
    660,295.74/990,513 = 210,910.98/x
  3. Step 3: Cross multiply
    660,295.74x = 990,513 × 210,910.98
  4. Step 4: Simplify right side
    660,295.74x = 208,910,067,532.74
  5. Step 5: Solve for x
    x = 208,910,067,532.74/660,295.74
  6. Step 6: Final answer
    x = 316,388.63

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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.