Home / 718,103.68-990,979.32-395,814.40

Finding the Fourth Proportional to 718,103.68, 990,979.32 and 395,814.40

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Solution

The fourth proportional to 718,103.68, 990,979.32 and 395,814.40 is: 546,221.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,103.68 : 990,979.32 = 395,814.40 : x
  2. Step 2: Convert to fraction form
    718,103.68/990,979.32 = 395,814.40/x
  3. Step 3: Cross multiply
    718,103.68x = 990,979.32 × 395,814.40
  4. Step 4: Simplify right side
    718,103.68x = 392,243,884,958.21
  5. Step 5: Solve for x
    x = 392,243,884,958.21/718,103.68
  6. Step 6: Final answer
    x = 546,221.80

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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.