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Finding the Fourth Proportional to 287,327.21, 430,990.81 and 100,334.57

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Solution

The fourth proportional to 287,327.21, 430,990.81 and 100,334.57 is: 150,501.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,327.21 : 430,990.81 = 100,334.57 : x
  2. Step 2: Convert to fraction form
    287,327.21/430,990.81 = 100,334.57/x
  3. Step 3: Cross multiply
    287,327.21x = 430,990.81 × 100,334.57
  4. Step 4: Simplify right side
    287,327.21x = 43,243,275,189.51
  5. Step 5: Solve for x
    x = 43,243,275,189.51/287,327.21
  6. Step 6: Final answer
    x = 150,501.85

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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.