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Finding the Fourth Proportional to 674,250.21, 930,493.61 and 387,770.56

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Solution

The fourth proportional to 674,250.21, 930,493.61 and 387,770.56 is: 535,139.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,250.21 : 930,493.61 = 387,770.56 : x
  2. Step 2: Convert to fraction form
    674,250.21/930,493.61 = 387,770.56/x
  3. Step 3: Cross multiply
    674,250.21x = 930,493.61 × 387,770.56
  4. Step 4: Simplify right side
    674,250.21x = 360,818,025,415.17
  5. Step 5: Solve for x
    x = 360,818,025,415.17/674,250.21
  6. Step 6: Final answer
    x = 535,139.66

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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.