Home / 431,721.60-647,582.40-326,745.60

Finding the Fourth Proportional to 431,721.60, 647,582.40 and 326,745.60

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Solution

The fourth proportional to 431,721.60, 647,582.40 and 326,745.60 is: 490,118.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,721.60 : 647,582.40 = 326,745.60 : x
  2. Step 2: Convert to fraction form
    431,721.60/647,582.40 = 326,745.60/x
  3. Step 3: Cross multiply
    431,721.60x = 647,582.40 × 326,745.60
  4. Step 4: Simplify right side
    431,721.60x = 211,594,699,837.44
  5. Step 5: Solve for x
    x = 211,594,699,837.44/431,721.60
  6. Step 6: Final answer
    x = 490,118.40

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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.