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Finding the Fourth Proportional to 265,315.20, 397,972.80 and 212,827.20

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Solution

The fourth proportional to 265,315.20, 397,972.80 and 212,827.20 is: 319,240.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,315.20 : 397,972.80 = 212,827.20 : x
  2. Step 2: Convert to fraction form
    265,315.20/397,972.80 = 212,827.20/x
  3. Step 3: Cross multiply
    265,315.20x = 397,972.80 × 212,827.20
  4. Step 4: Simplify right side
    265,315.20x = 84,699,436,700.16
  5. Step 5: Solve for x
    x = 84,699,436,700.16/265,315.20
  6. Step 6: Final answer
    x = 319,240.80

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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.