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Finding the Fourth Proportional to 661,940.50, 913,477.89 and 360,136.66

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Solution

The fourth proportional to 661,940.50, 913,477.89 and 360,136.66 is: 496,988.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,940.50 : 913,477.89 = 360,136.66 : x
  2. Step 2: Convert to fraction form
    661,940.50/913,477.89 = 360,136.66/x
  3. Step 3: Cross multiply
    661,940.50x = 913,477.89 × 360,136.66
  4. Step 4: Simplify right side
    661,940.50x = 328,976,876,288.45
  5. Step 5: Solve for x
    x = 328,976,876,288.45/661,940.50
  6. Step 6: Final answer
    x = 496,988.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.