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Finding the Fourth Proportional to 489,900.30, 676,010.16 and 275,064

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Solution

The fourth proportional to 489,900.30, 676,010.16 and 275,064 is: 379,558.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,900.30 : 676,010.16 = 275,064 : x
  2. Step 2: Convert to fraction form
    489,900.30/676,010.16 = 275,064/x
  3. Step 3: Cross multiply
    489,900.30x = 676,010.16 × 275,064
  4. Step 4: Simplify right side
    489,900.30x = 185,946,058,650.24
  5. Step 5: Solve for x
    x = 185,946,058,650.24/489,900.30
  6. Step 6: Final answer
    x = 379,558.98

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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.