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Finding the Fourth Proportional to 613,091.48, 845,586.94 and 398,300.75

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Solution

The fourth proportional to 613,091.48, 845,586.94 and 398,300.75 is: 549,343.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,091.48 : 845,586.94 = 398,300.75 : x
  2. Step 2: Convert to fraction form
    613,091.48/845,586.94 = 398,300.75/x
  3. Step 3: Cross multiply
    613,091.48x = 845,586.94 × 398,300.75
  4. Step 4: Simplify right side
    613,091.48x = 336,797,910,400.70
  5. Step 5: Solve for x
    x = 336,797,910,400.70/613,091.48
  6. Step 6: Final answer
    x = 549,343.65

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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.