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Finding the Fourth Proportional to 421.87, 632.96 and 148.01

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Solution

The fourth proportional to 421.87, 632.96 and 148.01 is: 222.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.87 : 632.96 = 148.01 : x
  2. Step 2: Convert to fraction form
    421.87/632.96 = 148.01/x
  3. Step 3: Cross multiply
    421.87x = 632.96 × 148.01
  4. Step 4: Simplify right side
    421.87x = 93,681.06
  5. Step 5: Solve for x
    x = 93,681.06/421.87
  6. Step 6: Final answer
    x = 222.06

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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.