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Finding the Fourth Proportional to 511,129.80, 705,363.94 and 281,695.36

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Solution

The fourth proportional to 511,129.80, 705,363.94 and 281,695.36 is: 388,742.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,129.80 : 705,363.94 = 281,695.36 : x
  2. Step 2: Convert to fraction form
    511,129.80/705,363.94 = 281,695.36/x
  3. Step 3: Cross multiply
    511,129.80x = 705,363.94 × 281,695.36
  4. Step 4: Simplify right side
    511,129.80x = 198,697,747,598.03
  5. Step 5: Solve for x
    x = 198,697,747,598.03/511,129.80
  6. Step 6: Final answer
    x = 388,742.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.