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Finding the Fourth Proportional to 355,521.77, 490,627.77 and 212,255.09

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Solution

The fourth proportional to 355,521.77, 490,627.77 and 212,255.09 is: 292,916.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,521.77 : 490,627.77 = 212,255.09 : x
  2. Step 2: Convert to fraction form
    355,521.77/490,627.77 = 212,255.09/x
  3. Step 3: Cross multiply
    355,521.77x = 490,627.77 × 212,255.09
  4. Step 4: Simplify right side
    355,521.77x = 104,138,241,477.85
  5. Step 5: Solve for x
    x = 104,138,241,477.85/355,521.77
  6. Step 6: Final answer
    x = 292,916.64

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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.