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Finding the Fourth Proportional to 1,168.79, 1,752.95 and 438.35

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Solution

The fourth proportional to 1,168.79, 1,752.95 and 438.35 is: 657.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.79 : 1,752.95 = 438.35 : x
  2. Step 2: Convert to fraction form
    1,168.79/1,752.95 = 438.35/x
  3. Step 3: Cross multiply
    1,168.79x = 1,752.95 × 438.35
  4. Step 4: Simplify right side
    1,168.79x = 768,403.44
  5. Step 5: Solve for x
    x = 768,403.44/1,168.79
  6. Step 6: Final answer
    x = 657.43

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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.