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Finding the Fourth Proportional to 561,907.40, 843,638.70 and 443,712.20

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Solution

The fourth proportional to 561,907.40, 843,638.70 and 443,712.20 is: 666,182.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,907.40 : 843,638.70 = 443,712.20 : x
  2. Step 2: Convert to fraction form
    561,907.40/843,638.70 = 443,712.20/x
  3. Step 3: Cross multiply
    561,907.40x = 843,638.70 × 443,712.20
  4. Step 4: Simplify right side
    561,907.40x = 374,332,783,582.14
  5. Step 5: Solve for x
    x = 374,332,783,582.14/561,907.40
  6. Step 6: Final answer
    x = 666,182.33

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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.