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Finding the Fourth Proportional to 392,485.77, 541,488.65 and 222,621.48

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Solution

The fourth proportional to 392,485.77, 541,488.65 and 222,621.48 is: 307,137.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,485.77 : 541,488.65 = 222,621.48 : x
  2. Step 2: Convert to fraction form
    392,485.77/541,488.65 = 222,621.48/x
  3. Step 3: Cross multiply
    392,485.77x = 541,488.65 × 222,621.48
  4. Step 4: Simplify right side
    392,485.77x = 120,547,003,553.10
  5. Step 5: Solve for x
    x = 120,547,003,553.10/392,485.77
  6. Step 6: Final answer
    x = 307,137.26

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1.5x scale

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.