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Finding the Fourth Proportional to 452.64, 679.05 and 128.01

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Solution

The fourth proportional to 452.64, 679.05 and 128.01 is: 192.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.64 : 679.05 = 128.01 : x
  2. Step 2: Convert to fraction form
    452.64/679.05 = 128.01/x
  3. Step 3: Cross multiply
    452.64x = 679.05 × 128.01
  4. Step 4: Simplify right side
    452.64x = 86,925.19
  5. Step 5: Solve for x
    x = 86,925.19/452.64
  6. Step 6: Final answer
    x = 192.04

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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.