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Finding the Fourth Proportional to 855,768.80, 1,180,992.79 and 488,305.77

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Solution

The fourth proportional to 855,768.80, 1,180,992.79 and 488,305.77 is: 673,880.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,768.80 : 1,180,992.79 = 488,305.77 : x
  2. Step 2: Convert to fraction form
    855,768.80/1,180,992.79 = 488,305.77/x
  3. Step 3: Cross multiply
    855,768.80x = 1,180,992.79 × 488,305.77
  4. Step 4: Simplify right side
    855,768.80x = 576,685,592,464.63
  5. Step 5: Solve for x
    x = 576,685,592,464.63/855,768.80
  6. Step 6: Final answer
    x = 673,880.13

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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.