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Finding the Fourth Proportional to 56.83, 78.42 and 35

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Solution

The fourth proportional to 56.83, 78.42 and 35 is: 48.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.83 : 78.42 = 35 : x
  2. Step 2: Convert to fraction form
    56.83/78.42 = 35/x
  3. Step 3: Cross multiply
    56.83x = 78.42 × 35
  4. Step 4: Simplify right side
    56.83x = 2,744.70
  5. Step 5: Solve for x
    x = 2,744.70/56.83
  6. Step 6: Final answer
    x = 48.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.