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Finding the Fourth Proportional to 287,303.58, 430,979.94 and 87,625.89

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Solution

The fourth proportional to 287,303.58, 430,979.94 and 87,625.89 is: 131,446.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,303.58 : 430,979.94 = 87,625.89 : x
  2. Step 2: Convert to fraction form
    287,303.58/430,979.94 = 87,625.89/x
  3. Step 3: Cross multiply
    287,303.58x = 430,979.94 × 87,625.89
  4. Step 4: Simplify right side
    287,303.58x = 37,765,000,814.65
  5. Step 5: Solve for x
    x = 37,765,000,814.65/287,303.58
  6. Step 6: Final answer
    x = 131,446.33

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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.