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Finding the Fourth Proportional to 613,085.46, 845,578.64 and 398,294.73

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Solution

The fourth proportional to 613,085.46, 845,578.64 and 398,294.73 is: 549,335.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,085.46 : 845,578.64 = 398,294.73 : x
  2. Step 2: Convert to fraction form
    613,085.46/845,578.64 = 398,294.73/x
  3. Step 3: Cross multiply
    613,085.46x = 845,578.64 × 398,294.73
  4. Step 4: Simplify right side
    613,085.46x = 336,789,514,121.09
  5. Step 5: Solve for x
    x = 336,789,514,121.09/613,085.46
  6. Step 6: Final answer
    x = 549,335.35

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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.