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Finding the Fourth Proportional to 528.12, 788.37 and 446.20

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Solution

The fourth proportional to 528.12, 788.37 and 446.20 is: 666.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.12 : 788.37 = 446.20 : x
  2. Step 2: Convert to fraction form
    528.12/788.37 = 446.20/x
  3. Step 3: Cross multiply
    528.12x = 788.37 × 446.20
  4. Step 4: Simplify right side
    528.12x = 351,770.69
  5. Step 5: Solve for x
    x = 351,770.69/528.12
  6. Step 6: Final answer
    x = 666.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.