Home / 718,109.88-990,979.79-395,849.96

Finding the Fourth Proportional to 718,109.88, 990,979.79 and 395,849.96

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Solution

The fourth proportional to 718,109.88, 990,979.79 and 395,849.96 is: 546,266.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,109.88 : 990,979.79 = 395,849.96 : x
  2. Step 2: Convert to fraction form
    718,109.88/990,979.79 = 395,849.96/x
  3. Step 3: Cross multiply
    718,109.88x = 990,979.79 × 395,849.96
  4. Step 4: Simplify right side
    718,109.88x = 392,279,303,298.16
  5. Step 5: Solve for x
    x = 392,279,303,298.16/718,109.88
  6. Step 6: Final answer
    x = 546,266.41

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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.