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Finding the Fourth Proportional to 660,663.90, 990,782.60 and 187,222.14

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Solution

The fourth proportional to 660,663.90, 990,782.60 and 187,222.14 is: 280,772.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,663.90 : 990,782.60 = 187,222.14 : x
  2. Step 2: Convert to fraction form
    660,663.90/990,782.60 = 187,222.14/x
  3. Step 3: Cross multiply
    660,663.90x = 990,782.60 × 187,222.14
  4. Step 4: Simplify right side
    660,663.90x = 185,496,438,646.76
  5. Step 5: Solve for x
    x = 185,496,438,646.76/660,663.90
  6. Step 6: Final answer
    x = 280,772.78

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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.