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Finding the Fourth Proportional to 889,146, 1,227,021.48 and 486,738

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Solution

The fourth proportional to 889,146, 1,227,021.48 and 486,738 is: 671,698.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,146 : 1,227,021.48 = 486,738 : x
  2. Step 2: Convert to fraction form
    889,146/1,227,021.48 = 486,738/x
  3. Step 3: Cross multiply
    889,146x = 1,227,021.48 × 486,738
  4. Step 4: Simplify right side
    889,146x = 597,237,981,132.24
  5. Step 5: Solve for x
    x = 597,237,981,132.24/889,146
  6. Step 6: Final answer
    x = 671,698.44

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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.