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Finding the Fourth Proportional to 485.76, 670.74 and 375.06

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Solution

The fourth proportional to 485.76, 670.74 and 375.06 is: 517.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.76 : 670.74 = 375.06 : x
  2. Step 2: Convert to fraction form
    485.76/670.74 = 375.06/x
  3. Step 3: Cross multiply
    485.76x = 670.74 × 375.06
  4. Step 4: Simplify right side
    485.76x = 251,567.74
  5. Step 5: Solve for x
    x = 251,567.74/485.76
  6. Step 6: Final answer
    x = 517.88

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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.