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Finding the Fourth Proportional to 421,575.50, 632,371.47 and 155,198.90

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Solution

The fourth proportional to 421,575.50, 632,371.47 and 155,198.90 is: 232,801.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,575.50 : 632,371.47 = 155,198.90 : x
  2. Step 2: Convert to fraction form
    421,575.50/632,371.47 = 155,198.90/x
  3. Step 3: Cross multiply
    421,575.50x = 632,371.47 × 155,198.90
  4. Step 4: Simplify right side
    421,575.50x = 98,143,352,597.53
  5. Step 5: Solve for x
    x = 98,143,352,597.53/421,575.50
  6. Step 6: Final answer
    x = 232,801.37

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1.5x scale

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.