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Finding the Fourth Proportional to 287,171.21, 430,821.06 and 87,507.22

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Solution

The fourth proportional to 287,171.21, 430,821.06 and 87,507.22 is: 131,280.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,171.21 : 430,821.06 = 87,507.22 : x
  2. Step 2: Convert to fraction form
    287,171.21/430,821.06 = 87,507.22/x
  3. Step 3: Cross multiply
    287,171.21x = 430,821.06 × 87,507.22
  4. Step 4: Simplify right side
    287,171.21x = 37,699,953,278.05
  5. Step 5: Solve for x
    x = 37,699,953,278.05/287,171.21
  6. Step 6: Final answer
    x = 131,280.41

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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.