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Finding the Fourth Proportional to 667,284.39, 920,918.70 and 380,847.74

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Solution

The fourth proportional to 667,284.39, 920,918.70 and 380,847.74 is: 525,607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,284.39 : 920,918.70 = 380,847.74 : x
  2. Step 2: Convert to fraction form
    667,284.39/920,918.70 = 380,847.74/x
  3. Step 3: Cross multiply
    667,284.39x = 920,918.70 × 380,847.74
  4. Step 4: Simplify right side
    667,284.39x = 350,729,801,014.15
  5. Step 5: Solve for x
    x = 350,729,801,014.15/667,284.39
  6. Step 6: Final answer
    x = 525,607.68

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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.