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Finding the Fourth Proportional to 287,860.75, 430,892.60 and 212,044.77

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Solution

The fourth proportional to 287,860.75, 430,892.60 and 212,044.77 is: 317,405.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,860.75 : 430,892.60 = 212,044.77 : x
  2. Step 2: Convert to fraction form
    287,860.75/430,892.60 = 212,044.77/x
  3. Step 3: Cross multiply
    287,860.75x = 430,892.60 × 212,044.77
  4. Step 4: Simplify right side
    287,860.75x = 91,368,521,201.48
  5. Step 5: Solve for x
    x = 91,368,521,201.48/287,860.75
  6. Step 6: Final answer
    x = 317,405.28

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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.