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Finding the Fourth Proportional to 668,906.25, 923,090.64 and 400,634.25

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Solution

The fourth proportional to 668,906.25, 923,090.64 and 400,634.25 is: 552,875.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,906.25 : 923,090.64 = 400,634.25 : x
  2. Step 2: Convert to fraction form
    668,906.25/923,090.64 = 400,634.25/x
  3. Step 3: Cross multiply
    668,906.25x = 923,090.64 × 400,634.25
  4. Step 4: Simplify right side
    668,906.25x = 369,821,726,238.42
  5. Step 5: Solve for x
    x = 369,821,726,238.42/668,906.25
  6. Step 6: Final answer
    x = 552,875.27

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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.