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Finding the Fourth Proportional to 936.78, 1,404.10 and 526.12

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Solution

The fourth proportional to 936.78, 1,404.10 and 526.12 is: 788.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.78 : 1,404.10 = 526.12 : x
  2. Step 2: Convert to fraction form
    936.78/1,404.10 = 526.12/x
  3. Step 3: Cross multiply
    936.78x = 1,404.10 × 526.12
  4. Step 4: Simplify right side
    936.78x = 738,725.09
  5. Step 5: Solve for x
    x = 738,725.09/936.78
  6. Step 6: Final answer
    x = 788.58

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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.