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Finding the Fourth Proportional to 956.78, 1,435.16 and 523.70

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Solution

The fourth proportional to 956.78, 1,435.16 and 523.70 is: 785.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.78 : 1,435.16 = 523.70 : x
  2. Step 2: Convert to fraction form
    956.78/1,435.16 = 523.70/x
  3. Step 3: Cross multiply
    956.78x = 1,435.16 × 523.70
  4. Step 4: Simplify right side
    956.78x = 751,590.67
  5. Step 5: Solve for x
    x = 751,590.67/956.78
  6. Step 6: Final answer
    x = 785.54

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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.