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Finding the Fourth Proportional to 421,955.39, 632,953.49 and 137,645.39

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Solution

The fourth proportional to 421,955.39, 632,953.49 and 137,645.39 is: 206,474.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,955.39 : 632,953.49 = 137,645.39 : x
  2. Step 2: Convert to fraction form
    421,955.39/632,953.49 = 137,645.39/x
  3. Step 3: Cross multiply
    421,955.39x = 632,953.49 × 137,645.39
  4. Step 4: Simplify right side
    421,955.39x = 87,123,130,877.07
  5. Step 5: Solve for x
    x = 87,123,130,877.07/421,955.39
  6. Step 6: Final answer
    x = 206,474.74

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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.