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Finding the Fourth Proportional to 561,160.60, 774,400.77 and 306,511.78

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Solution

The fourth proportional to 561,160.60, 774,400.77 and 306,511.78 is: 422,985.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,160.60 : 774,400.77 = 306,511.78 : x
  2. Step 2: Convert to fraction form
    561,160.60/774,400.77 = 306,511.78/x
  3. Step 3: Cross multiply
    561,160.60x = 774,400.77 × 306,511.78
  4. Step 4: Simplify right side
    561,160.60x = 237,362,958,446.07
  5. Step 5: Solve for x
    x = 237,362,958,446.07/561,160.60
  6. Step 6: Final answer
    x = 422,985.79

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1.5x scale

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.