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Finding the Fourth Proportional to 667,370.63, 920,971.47 and 380,884.56

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Solution

The fourth proportional to 667,370.63, 920,971.47 and 380,884.56 is: 525,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,370.63 : 920,971.47 = 380,884.56 : x
  2. Step 2: Convert to fraction form
    667,370.63/920,971.47 = 380,884.56/x
  3. Step 3: Cross multiply
    667,370.63x = 920,971.47 × 380,884.56
  4. Step 4: Simplify right side
    667,370.63x = 350,783,813,123.50
  5. Step 5: Solve for x
    x = 350,783,813,123.50/667,370.63
  6. Step 6: Final answer
    x = 525,620.70

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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.