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Finding the Fourth Proportional to 578.75, 798.65 and 330.11

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Solution

The fourth proportional to 578.75, 798.65 and 330.11 is: 455.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.75 : 798.65 = 330.11 : x
  2. Step 2: Convert to fraction form
    578.75/798.65 = 330.11/x
  3. Step 3: Cross multiply
    578.75x = 798.65 × 330.11
  4. Step 4: Simplify right side
    578.75x = 263,638.36
  5. Step 5: Solve for x
    x = 263,638.36/578.75
  6. Step 6: Final answer
    x = 455.53

Related Problems

Find fourth proportional to 289.38, 399.33 and 165.05
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Double scale
Find fourth proportional to 579.75, 800.03 and 331.11
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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.