Home / 718,021.26-990,732.87-431,436.78

Finding the Fourth Proportional to 718,021.26, 990,732.87 and 431,436.78

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Solution

The fourth proportional to 718,021.26, 990,732.87 and 431,436.78 is: 595,300.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,021.26 : 990,732.87 = 431,436.78 : x
  2. Step 2: Convert to fraction form
    718,021.26/990,732.87 = 431,436.78/x
  3. Step 3: Cross multiply
    718,021.26x = 990,732.87 × 431,436.78
  4. Step 4: Simplify right side
    718,021.26x = 427,438,599,272.96
  5. Step 5: Solve for x
    x = 427,438,599,272.96/718,021.26
  6. Step 6: Final answer
    x = 595,300.76

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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.