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Finding the Fourth Proportional to 995,661.60, 1,489,555.80 and 864,004.20

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Solution

The fourth proportional to 995,661.60, 1,489,555.80 and 864,004.20 is: 1,292,590.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    995,661.60 : 1,489,555.80 = 864,004.20 : x
  2. Step 2: Convert to fraction form
    995,661.60/1,489,555.80 = 864,004.20/x
  3. Step 3: Cross multiply
    995,661.60x = 1,489,555.80 × 864,004.20
  4. Step 4: Simplify right side
    995,661.60x = 1,286,982,467,334.36
  5. Step 5: Solve for x
    x = 1,286,982,467,334.36/995,661.60
  6. Step 6: Final answer
    x = 1,292,590.24

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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.