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Finding the Fourth Proportional to 662.86, 914.79 and 383.13

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Solution

The fourth proportional to 662.86, 914.79 and 383.13 is: 528.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.86 : 914.79 = 383.13 : x
  2. Step 2: Convert to fraction form
    662.86/914.79 = 383.13/x
  3. Step 3: Cross multiply
    662.86x = 914.79 × 383.13
  4. Step 4: Simplify right side
    662.86x = 350,483.49
  5. Step 5: Solve for x
    x = 350,483.49/662.86
  6. Step 6: Final answer
    x = 528.74

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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.