Home / 858,481.27-1,287,749.34-431,784.20

Finding the Fourth Proportional to 858,481.27, 1,287,749.34 and 431,784.20

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Solution

The fourth proportional to 858,481.27, 1,287,749.34 and 431,784.20 is: 647,690.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,481.27 : 1,287,749.34 = 431,784.20 : x
  2. Step 2: Convert to fraction form
    858,481.27/1,287,749.34 = 431,784.20/x
  3. Step 3: Cross multiply
    858,481.27x = 1,287,749.34 × 431,784.20
  4. Step 4: Simplify right side
    858,481.27x = 556,029,821,791.80
  5. Step 5: Solve for x
    x = 556,029,821,791.80/858,481.27
  6. Step 6: Final answer
    x = 647,690.10

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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.