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Finding the Fourth Proportional to 355,145.70, 490,020.36 and 211,877.76

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Solution

The fourth proportional to 355,145.70, 490,020.36 and 211,877.76 is: 292,343.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,145.70 : 490,020.36 = 211,877.76 : x
  2. Step 2: Convert to fraction form
    355,145.70/490,020.36 = 211,877.76/x
  3. Step 3: Cross multiply
    355,145.70x = 490,020.36 × 211,877.76
  4. Step 4: Simplify right side
    355,145.70x = 103,824,416,231.19
  5. Step 5: Solve for x
    x = 103,824,416,231.19/355,145.70
  6. Step 6: Final answer
    x = 292,343.16

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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.