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Finding the Fourth Proportional to 431,039.60, 646,559.40 and 115,528.40

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Solution

The fourth proportional to 431,039.60, 646,559.40 and 115,528.40 is: 173,292.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,039.60 : 646,559.40 = 115,528.40 : x
  2. Step 2: Convert to fraction form
    431,039.60/646,559.40 = 115,528.40/x
  3. Step 3: Cross multiply
    431,039.60x = 646,559.40 × 115,528.40
  4. Step 4: Simplify right side
    431,039.60x = 74,695,972,986.96
  5. Step 5: Solve for x
    x = 74,695,972,986.96/431,039.60
  6. Step 6: Final answer
    x = 173,292.60

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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.