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Finding the Fourth Proportional to 561,555.56, 772,993.86 and 489,810.64

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Solution

The fourth proportional to 561,555.56, 772,993.86 and 489,810.64 is: 674,235.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,555.56 : 772,993.86 = 489,810.64 : x
  2. Step 2: Convert to fraction form
    561,555.56/772,993.86 = 489,810.64/x
  3. Step 3: Cross multiply
    561,555.56x = 772,993.86 × 489,810.64
  4. Step 4: Simplify right side
    561,555.56x = 378,620,617,282.67
  5. Step 5: Solve for x
    x = 378,620,617,282.67/561,555.56
  6. Step 6: Final answer
    x = 674,235.36

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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.