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Finding the Fourth Proportional to 491.64, 737.20 and 345.48

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Solution

The fourth proportional to 491.64, 737.20 and 345.48 is: 518.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.64 : 737.20 = 345.48 : x
  2. Step 2: Convert to fraction form
    491.64/737.20 = 345.48/x
  3. Step 3: Cross multiply
    491.64x = 737.20 × 345.48
  4. Step 4: Simplify right side
    491.64x = 254,687.86
  5. Step 5: Solve for x
    x = 254,687.86/491.64
  6. Step 6: Final answer
    x = 518.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.