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Finding the Fourth Proportional to 718,056.99, 990,940.76 and 412,189.25

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Solution

The fourth proportional to 718,056.99, 990,940.76 and 412,189.25 is: 568,833.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,056.99 : 990,940.76 = 412,189.25 : x
  2. Step 2: Convert to fraction form
    718,056.99/990,940.76 = 412,189.25/x
  3. Step 3: Cross multiply
    718,056.99x = 990,940.76 × 412,189.25
  4. Step 4: Simplify right side
    718,056.99x = 408,455,129,223.48
  5. Step 5: Solve for x
    x = 408,455,129,223.48/718,056.99
  6. Step 6: Final answer
    x = 568,833.86

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1.5x scale

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.