Home / 1,208,997.55-1,668,416.61-665,121.65

Finding the Fourth Proportional to 1,208,997.55, 1,668,416.61 and 665,121.65

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Solution

The fourth proportional to 1,208,997.55, 1,668,416.61 and 665,121.65 is: 917,867.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,997.55 : 1,668,416.61 = 665,121.65 : x
  2. Step 2: Convert to fraction form
    1,208,997.55/1,668,416.61 = 665,121.65/x
  3. Step 3: Cross multiply
    1,208,997.55x = 1,668,416.61 × 665,121.65
  4. Step 4: Simplify right side
    1,208,997.55x = 1,109,700,014,889.34
  5. Step 5: Solve for x
    x = 1,109,700,014,889.34/1,208,997.55
  6. Step 6: Final answer
    x = 917,867.88

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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.