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Finding the Fourth Proportional to 355,685.67, 490,845.69 and 212,529.51

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Solution

The fourth proportional to 355,685.67, 490,845.69 and 212,529.51 is: 293,290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,685.67 : 490,845.69 = 212,529.51 : x
  2. Step 2: Convert to fraction form
    355,685.67/490,845.69 = 212,529.51/x
  3. Step 3: Cross multiply
    355,685.67x = 490,845.69 × 212,529.51
  4. Step 4: Simplify right side
    355,685.67x = 104,319,193,981.31
  5. Step 5: Solve for x
    x = 104,319,193,981.31/355,685.67
  6. Step 6: Final answer
    x = 293,290.40

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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.