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Finding the Fourth Proportional to 668,921.77, 923,107.21 and 362,990.44

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Solution

The fourth proportional to 668,921.77, 923,107.21 and 362,990.44 is: 500,924.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,921.77 : 923,107.21 = 362,990.44 : x
  2. Step 2: Convert to fraction form
    668,921.77/923,107.21 = 362,990.44/x
  3. Step 3: Cross multiply
    668,921.77x = 923,107.21 × 362,990.44
  4. Step 4: Simplify right side
    668,921.77x = 335,079,092,325.07
  5. Step 5: Solve for x
    x = 335,079,092,325.07/668,921.77
  6. Step 6: Final answer
    x = 500,924.18

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Double scale
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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.