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Finding the Fourth Proportional to 526.31, 788.39 and 423.04

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Solution

The fourth proportional to 526.31, 788.39 and 423.04 is: 633.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.31 : 788.39 = 423.04 : x
  2. Step 2: Convert to fraction form
    526.31/788.39 = 423.04/x
  3. Step 3: Cross multiply
    526.31x = 788.39 × 423.04
  4. Step 4: Simplify right side
    526.31x = 333,514.45
  5. Step 5: Solve for x
    x = 333,514.45/526.31
  6. Step 6: Final answer
    x = 633.68

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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.