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Finding the Fourth Proportional to 478.76, 660.98 and 373.66

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Solution

The fourth proportional to 478.76, 660.98 and 373.66 is: 515.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.76 : 660.98 = 373.66 : x
  2. Step 2: Convert to fraction form
    478.76/660.98 = 373.66/x
  3. Step 3: Cross multiply
    478.76x = 660.98 × 373.66
  4. Step 4: Simplify right side
    478.76x = 246,981.07
  5. Step 5: Solve for x
    x = 246,981.07/478.76
  6. Step 6: Final answer
    x = 515.88

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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.