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Finding the Fourth Proportional to 431,323.60, 646,870.20 and 131,803.60

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Solution

The fourth proportional to 431,323.60, 646,870.20 and 131,803.60 is: 197,670.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,323.60 : 646,870.20 = 131,803.60 : x
  2. Step 2: Convert to fraction form
    431,323.60/646,870.20 = 131,803.60/x
  3. Step 3: Cross multiply
    431,323.60x = 646,870.20 × 131,803.60
  4. Step 4: Simplify right side
    431,323.60x = 85,259,821,092.72
  5. Step 5: Solve for x
    x = 85,259,821,092.72/431,323.60
  6. Step 6: Final answer
    x = 197,670.20

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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.