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Finding the Fourth Proportional to 511,720.80, 767,581.20 and 404,815.20

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Solution

The fourth proportional to 511,720.80, 767,581.20 and 404,815.20 is: 607,222.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,720.80 : 767,581.20 = 404,815.20 : x
  2. Step 2: Convert to fraction form
    511,720.80/767,581.20 = 404,815.20/x
  3. Step 3: Cross multiply
    511,720.80x = 767,581.20 × 404,815.20
  4. Step 4: Simplify right side
    511,720.80x = 310,728,536,994.24
  5. Step 5: Solve for x
    x = 310,728,536,994.24/511,720.80
  6. Step 6: Final answer
    x = 607,222.80

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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.