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Finding the Fourth Proportional to 290,303.80, 434,580.90 and 255,311.80

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Solution

The fourth proportional to 290,303.80, 434,580.90 and 255,311.80 is: 382,198.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,303.80 : 434,580.90 = 255,311.80 : x
  2. Step 2: Convert to fraction form
    290,303.80/434,580.90 = 255,311.80/x
  3. Step 3: Cross multiply
    290,303.80x = 434,580.90 × 255,311.80
  4. Step 4: Simplify right side
    290,303.80x = 110,953,631,824.62
  5. Step 5: Solve for x
    x = 110,953,631,824.62/290,303.80
  6. Step 6: Final answer
    x = 382,198.34

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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.