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Finding the Fourth Proportional to 287,285.52, 430,998.08 and 87,609.45

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Solution

The fourth proportional to 287,285.52, 430,998.08 and 87,609.45 is: 131,435.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,285.52 : 430,998.08 = 87,609.45 : x
  2. Step 2: Convert to fraction form
    287,285.52/430,998.08 = 87,609.45/x
  3. Step 3: Cross multiply
    287,285.52x = 430,998.08 × 87,609.45
  4. Step 4: Simplify right side
    287,285.52x = 37,759,504,739.86
  5. Step 5: Solve for x
    x = 37,759,504,739.86/287,285.52
  6. Step 6: Final answer
    x = 131,435.46

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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.