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Finding the Fourth Proportional to 604,978.72, 908,028.85 and 305,669.66

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Solution

The fourth proportional to 604,978.72, 908,028.85 and 305,669.66 is: 458,787.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,978.72 : 908,028.85 = 305,669.66 : x
  2. Step 2: Convert to fraction form
    604,978.72/908,028.85 = 305,669.66/x
  3. Step 3: Cross multiply
    604,978.72x = 908,028.85 × 305,669.66
  4. Step 4: Simplify right side
    604,978.72x = 277,556,868,321.34
  5. Step 5: Solve for x
    x = 277,556,868,321.34/604,978.72
  6. Step 6: Final answer
    x = 458,787.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.