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Finding the Fourth Proportional to 511,420.80, 766,612.80 and 300,950.40

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Solution

The fourth proportional to 511,420.80, 766,612.80 and 300,950.40 is: 451,120.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,420.80 : 766,612.80 = 300,950.40 : x
  2. Step 2: Convert to fraction form
    511,420.80/766,612.80 = 300,950.40/x
  3. Step 3: Cross multiply
    511,420.80x = 766,612.80 × 300,950.40
  4. Step 4: Simplify right side
    511,420.80x = 230,712,428,805.12
  5. Step 5: Solve for x
    x = 230,712,428,805.12/511,420.80
  6. Step 6: Final answer
    x = 451,120.54

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1.5x scale

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.