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Finding the Fourth Proportional to 674,305.56, 930,540.96 and 387,818.28

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Solution

The fourth proportional to 674,305.56, 930,540.96 and 387,818.28 is: 535,188.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,305.56 : 930,540.96 = 387,818.28 : x
  2. Step 2: Convert to fraction form
    674,305.56/930,540.96 = 387,818.28/x
  3. Step 3: Cross multiply
    674,305.56x = 930,540.96 × 387,818.28
  4. Step 4: Simplify right side
    674,305.56x = 360,880,794,576.75
  5. Step 5: Solve for x
    x = 360,880,794,576.75/674,305.56
  6. Step 6: Final answer
    x = 535,188.82

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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.