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Finding the Fourth Proportional to 486.07, 670.40 and 346.05

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Solution

The fourth proportional to 486.07, 670.40 and 346.05 is: 477.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.07 : 670.40 = 346.05 : x
  2. Step 2: Convert to fraction form
    486.07/670.40 = 346.05/x
  3. Step 3: Cross multiply
    486.07x = 670.40 × 346.05
  4. Step 4: Simplify right side
    486.07x = 231,991.92
  5. Step 5: Solve for x
    x = 231,991.92/486.07
  6. Step 6: Final answer
    x = 477.28

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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.