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Finding the Fourth Proportional to 231,408.39, 319,339.35 and 130,806.39

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Solution

The fourth proportional to 231,408.39, 319,339.35 and 130,806.39 is: 180,510.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,408.39 : 319,339.35 = 130,806.39 : x
  2. Step 2: Convert to fraction form
    231,408.39/319,339.35 = 130,806.39/x
  3. Step 3: Cross multiply
    231,408.39x = 319,339.35 × 130,806.39
  4. Step 4: Simplify right side
    231,408.39x = 41,771,627,558.45
  5. Step 5: Solve for x
    x = 41,771,627,558.45/231,408.39
  6. Step 6: Final answer
    x = 180,510.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.