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Finding the Fourth Proportional to 478.50, 660.64 and 373.41

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Solution

The fourth proportional to 478.50, 660.64 and 373.41 is: 515.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.50 : 660.64 = 373.41 : x
  2. Step 2: Convert to fraction form
    478.50/660.64 = 373.41/x
  3. Step 3: Cross multiply
    478.50x = 660.64 × 373.41
  4. Step 4: Simplify right side
    478.50x = 246,686.28
  5. Step 5: Solve for x
    x = 246,686.28/478.50
  6. Step 6: Final answer
    x = 515.54

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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.