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Finding the Fourth Proportional to 380,879.40, 571,319.10 and 254,908.20

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Solution

The fourth proportional to 380,879.40, 571,319.10 and 254,908.20 is: 382,362.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,879.40 : 571,319.10 = 254,908.20 : x
  2. Step 2: Convert to fraction form
    380,879.40/571,319.10 = 254,908.20/x
  3. Step 3: Cross multiply
    380,879.40x = 571,319.10 × 254,908.20
  4. Step 4: Simplify right side
    380,879.40x = 145,633,923,406.62
  5. Step 5: Solve for x
    x = 145,633,923,406.62/380,879.40
  6. Step 6: Final answer
    x = 382,362.30

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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.