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Finding the Fourth Proportional to 1,173,918.24, 1,620,007.92 and 664,621.20

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Solution

The fourth proportional to 1,173,918.24, 1,620,007.92 and 664,621.20 is: 917,177.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173,918.24 : 1,620,007.92 = 664,621.20 : x
  2. Step 2: Convert to fraction form
    1,173,918.24/1,620,007.92 = 664,621.20/x
  3. Step 3: Cross multiply
    1,173,918.24x = 1,620,007.92 × 664,621.20
  4. Step 4: Simplify right side
    1,173,918.24x = 1,076,691,607,799.90
  5. Step 5: Solve for x
    x = 1,076,691,607,799.90/1,173,918.24
  6. Step 6: Final answer
    x = 917,177.68

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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.