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Finding the Fourth Proportional to 667,597.19, 921,321.02 and 381,209.27

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Solution

The fourth proportional to 667,597.19, 921,321.02 and 381,209.27 is: 526,089.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,597.19 : 921,321.02 = 381,209.27 : x
  2. Step 2: Convert to fraction form
    667,597.19/921,321.02 = 381,209.27/x
  3. Step 3: Cross multiply
    667,597.19x = 921,321.02 × 381,209.27
  4. Step 4: Simplify right side
    667,597.19x = 351,216,111,563.81
  5. Step 5: Solve for x
    x = 351,216,111,563.81/667,597.19
  6. Step 6: Final answer
    x = 526,089.86

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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.