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Finding the Fourth Proportional to 355,479.98, 490,568.20 and 212,252.54

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Solution

The fourth proportional to 355,479.98, 490,568.20 and 212,252.54 is: 292,911.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,479.98 : 490,568.20 = 212,252.54 : x
  2. Step 2: Convert to fraction form
    355,479.98/490,568.20 = 212,252.54/x
  3. Step 3: Cross multiply
    355,479.98x = 490,568.20 × 212,252.54
  4. Step 4: Simplify right side
    355,479.98x = 104,124,343,509.76
  5. Step 5: Solve for x
    x = 104,124,343,509.76/355,479.98
  6. Step 6: Final answer
    x = 292,911.98

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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.