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Finding the Fourth Proportional to 287,552.88, 430,388.64 and 211,631.04

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Solution

The fourth proportional to 287,552.88, 430,388.64 and 211,631.04 is: 316,754.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,552.88 : 430,388.64 = 211,631.04 : x
  2. Step 2: Convert to fraction form
    287,552.88/430,388.64 = 211,631.04/x
  3. Step 3: Cross multiply
    287,552.88x = 430,388.64 × 211,631.04
  4. Step 4: Simplify right side
    287,552.88x = 91,083,595,487.39
  5. Step 5: Solve for x
    x = 91,083,595,487.39/287,552.88
  6. Step 6: Final answer
    x = 316,754.25

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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.