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Finding the Fourth Proportional to 355,485.23, 490,575.47 and 212,257.79

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Solution

The fourth proportional to 355,485.23, 490,575.47 and 212,257.79 is: 292,919.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,485.23 : 490,575.47 = 212,257.79 : x
  2. Step 2: Convert to fraction form
    355,485.23/490,575.47 = 212,257.79/x
  3. Step 3: Cross multiply
    355,485.23x = 490,575.47 × 212,257.79
  4. Step 4: Simplify right side
    355,485.23x = 104,128,465,090.41
  5. Step 5: Solve for x
    x = 104,128,465,090.41/355,485.23
  6. Step 6: Final answer
    x = 292,919.24

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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.