Home / 405,815.80-608,723.70-389,486.20

Finding the Fourth Proportional to 405,815.80, 608,723.70 and 389,486.20

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Solution

The fourth proportional to 405,815.80, 608,723.70 and 389,486.20 is: 584,229.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,815.80 : 608,723.70 = 389,486.20 : x
  2. Step 2: Convert to fraction form
    405,815.80/608,723.70 = 389,486.20/x
  3. Step 3: Cross multiply
    405,815.80x = 608,723.70 × 389,486.20
  4. Step 4: Simplify right side
    405,815.80x = 237,089,480,762.94
  5. Step 5: Solve for x
    x = 237,089,480,762.94/405,815.80
  6. Step 6: Final answer
    x = 584,229.30

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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.