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Finding the Fourth Proportional to 287,190.20, 430,871.70 and 154,134.20

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Solution

The fourth proportional to 287,190.20, 430,871.70 and 154,134.20 is: 231,247.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,190.20 : 430,871.70 = 154,134.20 : x
  2. Step 2: Convert to fraction form
    287,190.20/430,871.70 = 154,134.20/x
  3. Step 3: Cross multiply
    287,190.20x = 430,871.70 × 154,134.20
  4. Step 4: Simplify right side
    287,190.20x = 66,412,064,782.14
  5. Step 5: Solve for x
    x = 66,412,064,782.14/287,190.20
  6. Step 6: Final answer
    x = 231,247.67

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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.