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Finding the Fourth Proportional to 431,047.60, 646,571.40 and 115,536.40

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Solution

The fourth proportional to 431,047.60, 646,571.40 and 115,536.40 is: 173,304.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,047.60 : 646,571.40 = 115,536.40 : x
  2. Step 2: Convert to fraction form
    431,047.60/646,571.40 = 115,536.40/x
  3. Step 3: Cross multiply
    431,047.60x = 646,571.40 × 115,536.40
  4. Step 4: Simplify right side
    431,047.60x = 74,702,531,898.96
  5. Step 5: Solve for x
    x = 74,702,531,898.96/431,047.60
  6. Step 6: Final answer
    x = 173,304.60

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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.