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Finding the Fourth Proportional to 718,218.78, 990,958.23 and 456,478.62

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Solution

The fourth proportional to 718,218.78, 990,958.23 and 456,478.62 is: 629,823.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,218.78 : 990,958.23 = 456,478.62 : x
  2. Step 2: Convert to fraction form
    718,218.78/990,958.23 = 456,478.62/x
  3. Step 3: Cross multiply
    718,218.78x = 990,958.23 × 456,478.62
  4. Step 4: Simplify right side
    718,218.78x = 452,351,245,308.04
  5. Step 5: Solve for x
    x = 452,351,245,308.04/718,218.78
  6. Step 6: Final answer
    x = 629,823.75

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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.