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Finding the Fourth Proportional to 421,521.52, 632,281.56 and 196,806.64

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Solution

The fourth proportional to 421,521.52, 632,281.56 and 196,806.64 is: 295,209.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,521.52 : 632,281.56 = 196,806.64 : x
  2. Step 2: Convert to fraction form
    421,521.52/632,281.56 = 196,806.64/x
  3. Step 3: Cross multiply
    421,521.52x = 632,281.56 × 196,806.64
  4. Step 4: Simplify right side
    421,521.52x = 124,437,209,357.56
  5. Step 5: Solve for x
    x = 124,437,209,357.56/421,521.52
  6. Step 6: Final answer
    x = 295,209.62

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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.