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Finding the Fourth Proportional to 874,690.80, 1,311,647.40 and 342,034.80

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Solution

The fourth proportional to 874,690.80, 1,311,647.40 and 342,034.80 is: 512,900.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,690.80 : 1,311,647.40 = 342,034.80 : x
  2. Step 2: Convert to fraction form
    874,690.80/1,311,647.40 = 342,034.80/x
  3. Step 3: Cross multiply
    874,690.80x = 1,311,647.40 × 342,034.80
  4. Step 4: Simplify right side
    874,690.80x = 448,629,056,129.52
  5. Step 5: Solve for x
    x = 448,629,056,129.52/874,690.80
  6. Step 6: Final answer
    x = 512,900.17

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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.