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Finding the Fourth Proportional to 355,510.27, 490,611.90 and 212,243.55

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Solution

The fourth proportional to 355,510.27, 490,611.90 and 212,243.55 is: 292,900.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,510.27 : 490,611.90 = 212,243.55 : x
  2. Step 2: Convert to fraction form
    355,510.27/490,611.90 = 212,243.55/x
  3. Step 3: Cross multiply
    355,510.27x = 490,611.90 × 212,243.55
  4. Step 4: Simplify right side
    355,510.27x = 104,129,211,328.25
  5. Step 5: Solve for x
    x = 104,129,211,328.25/355,510.27
  6. Step 6: Final answer
    x = 292,900.71

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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.