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Finding the Fourth Proportional to 660,451.76, 990,686.75 and 187,136.66

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Solution

The fourth proportional to 660,451.76, 990,686.75 and 187,136.66 is: 280,707.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,451.76 : 990,686.75 = 187,136.66 : x
  2. Step 2: Convert to fraction form
    660,451.76/990,686.75 = 187,136.66/x
  3. Step 3: Cross multiply
    660,451.76x = 990,686.75 × 187,136.66
  4. Step 4: Simplify right side
    660,451.76x = 185,393,809,501.26
  5. Step 5: Solve for x
    x = 185,393,809,501.26/660,451.76
  6. Step 6: Final answer
    x = 280,707.57

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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.