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Finding the Fourth Proportional to 380,321.80, 570,438.24 and 99,860.92

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Solution

The fourth proportional to 380,321.80, 570,438.24 and 99,860.92 is: 149,779.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,321.80 : 570,438.24 = 99,860.92 : x
  2. Step 2: Convert to fraction form
    380,321.80/570,438.24 = 99,860.92/x
  3. Step 3: Cross multiply
    380,321.80x = 570,438.24 × 99,860.92
  4. Step 4: Simplify right side
    380,321.80x = 56,964,487,449.58
  5. Step 5: Solve for x
    x = 56,964,487,449.58/380,321.80
  6. Step 6: Final answer
    x = 149,779.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.