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Finding the Fourth Proportional to 853,690.40, 1,280,600.40 and 254,604.80

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Solution

The fourth proportional to 853,690.40, 1,280,600.40 and 254,604.80 is: 381,926.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,690.40 : 1,280,600.40 = 254,604.80 : x
  2. Step 2: Convert to fraction form
    853,690.40/1,280,600.40 = 254,604.80/x
  3. Step 3: Cross multiply
    853,690.40x = 1,280,600.40 × 254,604.80
  4. Step 4: Simplify right side
    853,690.40x = 326,047,008,721.92
  5. Step 5: Solve for x
    x = 326,047,008,721.92/853,690.40
  6. Step 6: Final answer
    x = 381,926.53

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1.5x scale

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.