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Finding the Fourth Proportional to 674,245.33, 930,486.84 and 387,765.64

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Solution

The fourth proportional to 674,245.33, 930,486.84 and 387,765.64 is: 535,132.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,245.33 : 930,486.84 = 387,765.64 : x
  2. Step 2: Convert to fraction form
    674,245.33/930,486.84 = 387,765.64/x
  3. Step 3: Cross multiply
    674,245.33x = 930,486.84 × 387,765.64
  4. Step 4: Simplify right side
    674,245.33x = 360,810,825,024.18
  5. Step 5: Solve for x
    x = 360,810,825,024.18/674,245.33
  6. Step 6: Final answer
    x = 535,132.85

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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.