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Finding the Fourth Proportional to 421.02, 632.07 and 353.39

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Solution

The fourth proportional to 421.02, 632.07 and 353.39 is: 530.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.02 : 632.07 = 353.39 : x
  2. Step 2: Convert to fraction form
    421.02/632.07 = 353.39/x
  3. Step 3: Cross multiply
    421.02x = 632.07 × 353.39
  4. Step 4: Simplify right side
    421.02x = 223,364.06
  5. Step 5: Solve for x
    x = 223,364.06/421.02
  6. Step 6: Final answer
    x = 530.53

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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.