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Finding the Fourth Proportional to 287,260.40, 430,890.60 and 161,289.20

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Solution

The fourth proportional to 287,260.40, 430,890.60 and 161,289.20 is: 241,933.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,260.40 : 430,890.60 = 161,289.20 : x
  2. Step 2: Convert to fraction form
    287,260.40/430,890.60 = 161,289.20/x
  3. Step 3: Cross multiply
    287,260.40x = 430,890.60 × 161,289.20
  4. Step 4: Simplify right side
    287,260.40x = 69,498,000,161.52
  5. Step 5: Solve for x
    x = 69,498,000,161.52/287,260.40
  6. Step 6: Final answer
    x = 241,933.80

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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.