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Finding the Fourth Proportional to 355,129.08, 490,065.72 and 211,814.98

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Solution

The fourth proportional to 355,129.08, 490,065.72 and 211,814.98 is: 292,297.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,129.08 : 490,065.72 = 211,814.98 : x
  2. Step 2: Convert to fraction form
    355,129.08/490,065.72 = 211,814.98/x
  3. Step 3: Cross multiply
    355,129.08x = 490,065.72 × 211,814.98
  4. Step 4: Simplify right side
    355,129.08x = 103,803,260,680.49
  5. Step 5: Solve for x
    x = 103,803,260,680.49/355,129.08
  6. Step 6: Final answer
    x = 292,297.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.