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Finding the Fourth Proportional to 665,388, 918,258.12 and 363,601.44

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Solution

The fourth proportional to 665,388, 918,258.12 and 363,601.44 is: 501,782.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,388 : 918,258.12 = 363,601.44 : x
  2. Step 2: Convert to fraction form
    665,388/918,258.12 = 363,601.44/x
  3. Step 3: Cross multiply
    665,388x = 918,258.12 × 363,601.44
  4. Step 4: Simplify right side
    665,388x = 333,879,974,723.69
  5. Step 5: Solve for x
    x = 333,879,974,723.69/665,388
  6. Step 6: Final answer
    x = 501,782.38

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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.