Home / 738,321.91-1,018,884.92-398,790.16

Finding the Fourth Proportional to 738,321.91, 1,018,884.92 and 398,790.16

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Solution

The fourth proportional to 738,321.91, 1,018,884.92 and 398,790.16 is: 550,330.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,321.91 : 1,018,884.92 = 398,790.16 : x
  2. Step 2: Convert to fraction form
    738,321.91/1,018,884.92 = 398,790.16/x
  3. Step 3: Cross multiply
    738,321.91x = 1,018,884.92 × 398,790.16
  4. Step 4: Simplify right side
    738,321.91x = 406,321,280,268.39
  5. Step 5: Solve for x
    x = 406,321,280,268.39/738,321.91
  6. Step 6: Final answer
    x = 550,330.79

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Double scale
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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.