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Finding the Fourth Proportional to 211,311.78, 317,004.57 and 92,980.05

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Solution

The fourth proportional to 211,311.78, 317,004.57 and 92,980.05 is: 139,486.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,311.78 : 317,004.57 = 92,980.05 : x
  2. Step 2: Convert to fraction form
    211,311.78/317,004.57 = 92,980.05/x
  3. Step 3: Cross multiply
    211,311.78x = 317,004.57 × 92,980.05
  4. Step 4: Simplify right side
    211,311.78x = 29,475,100,768.83
  5. Step 5: Solve for x
    x = 29,475,100,768.83/211,311.78
  6. Step 6: Final answer
    x = 139,486.31

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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.