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Finding the Fourth Proportional to 956.72, 1,435.24 and 340.78

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Solution

The fourth proportional to 956.72, 1,435.24 and 340.78 is: 511.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.72 : 1,435.24 = 340.78 : x
  2. Step 2: Convert to fraction form
    956.72/1,435.24 = 340.78/x
  3. Step 3: Cross multiply
    956.72x = 1,435.24 × 340.78
  4. Step 4: Simplify right side
    956.72x = 489,101.09
  5. Step 5: Solve for x
    x = 489,101.09/956.72
  6. Step 6: Final answer
    x = 511.23

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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.