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Finding the Fourth Proportional to 628,986, 868,020.12 and 360,714

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Solution

The fourth proportional to 628,986, 868,020.12 and 360,714 is: 497,796.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,986 : 868,020.12 = 360,714 : x
  2. Step 2: Convert to fraction form
    628,986/868,020.12 = 360,714/x
  3. Step 3: Cross multiply
    628,986x = 868,020.12 × 360,714
  4. Step 4: Simplify right side
    628,986x = 313,107,009,565.68
  5. Step 5: Solve for x
    x = 313,107,009,565.68/628,986
  6. Step 6: Final answer
    x = 497,796.47

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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.