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Finding the Fourth Proportional to 674,645.44, 930,974.16 and 372,820

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Solution

The fourth proportional to 674,645.44, 930,974.16 and 372,820 is: 514,471.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,645.44 : 930,974.16 = 372,820 : x
  2. Step 2: Convert to fraction form
    674,645.44/930,974.16 = 372,820/x
  3. Step 3: Cross multiply
    674,645.44x = 930,974.16 × 372,820
  4. Step 4: Simplify right side
    674,645.44x = 347,085,786,331.20
  5. Step 5: Solve for x
    x = 347,085,786,331.20/674,645.44
  6. Step 6: Final answer
    x = 514,471.40

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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.