Home / 668,291.72-1,002,105.92-212,823.60

Finding the Fourth Proportional to 668,291.72, 1,002,105.92 and 212,823.60

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Solution

The fourth proportional to 668,291.72, 1,002,105.92 and 212,823.60 is: 319,129.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,291.72 : 1,002,105.92 = 212,823.60 : x
  2. Step 2: Convert to fraction form
    668,291.72/1,002,105.92 = 212,823.60/x
  3. Step 3: Cross multiply
    668,291.72x = 1,002,105.92 × 212,823.60
  4. Step 4: Simplify right side
    668,291.72x = 213,271,789,475.71
  5. Step 5: Solve for x
    x = 213,271,789,475.71/668,291.72
  6. Step 6: Final answer
    x = 319,129.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.