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Finding the Fourth Proportional to 485.84, 670.68 and 320.06

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Solution

The fourth proportional to 485.84, 670.68 and 320.06 is: 441.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.84 : 670.68 = 320.06 : x
  2. Step 2: Convert to fraction form
    485.84/670.68 = 320.06/x
  3. Step 3: Cross multiply
    485.84x = 670.68 × 320.06
  4. Step 4: Simplify right side
    485.84x = 214,657.84
  5. Step 5: Solve for x
    x = 214,657.84/485.84
  6. Step 6: Final answer
    x = 441.83

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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.