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Finding the Fourth Proportional to 877,668, 1,211,186.32 and 490,489.88

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Solution

The fourth proportional to 877,668, 1,211,186.32 and 490,489.88 is: 676,878.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,668 : 1,211,186.32 = 490,489.88 : x
  2. Step 2: Convert to fraction form
    877,668/1,211,186.32 = 490,489.88/x
  3. Step 3: Cross multiply
    877,668x = 1,211,186.32 × 490,489.88
  4. Step 4: Simplify right side
    877,668x = 594,074,634,556.18
  5. Step 5: Solve for x
    x = 594,074,634,556.18/877,668
  6. Step 6: Final answer
    x = 676,878.54

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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.