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Finding the Fourth Proportional to 511,859.20, 767,443.20 and 272,012.80

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Solution

The fourth proportional to 511,859.20, 767,443.20 and 272,012.80 is: 407,835.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,859.20 : 767,443.20 = 272,012.80 : x
  2. Step 2: Convert to fraction form
    511,859.20/767,443.20 = 272,012.80/x
  3. Step 3: Cross multiply
    511,859.20x = 767,443.20 × 272,012.80
  4. Step 4: Simplify right side
    511,859.20x = 208,754,373,672.96
  5. Step 5: Solve for x
    x = 208,754,373,672.96/511,859.20
  6. Step 6: Final answer
    x = 407,835.54

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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.