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Finding the Fourth Proportional to 855,133.10, 1,285,810.05 and 836,470.70

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Solution

The fourth proportional to 855,133.10, 1,285,810.05 and 836,470.70 is: 1,257,748.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,133.10 : 1,285,810.05 = 836,470.70 : x
  2. Step 2: Convert to fraction form
    855,133.10/1,285,810.05 = 836,470.70/x
  3. Step 3: Cross multiply
    855,133.10x = 1,285,810.05 × 836,470.70
  4. Step 4: Simplify right side
    855,133.10x = 1,075,542,432,590.54
  5. Step 5: Solve for x
    x = 1,075,542,432,590.54/855,133.10
  6. Step 6: Final answer
    x = 1,257,748.57

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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.