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Finding the Fourth Proportional to 369.02, 509.07 and 221.60

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Solution

The fourth proportional to 369.02, 509.07 and 221.60 is: 305.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.02 : 509.07 = 221.60 : x
  2. Step 2: Convert to fraction form
    369.02/509.07 = 221.60/x
  3. Step 3: Cross multiply
    369.02x = 509.07 × 221.60
  4. Step 4: Simplify right side
    369.02x = 112,809.91
  5. Step 5: Solve for x
    x = 112,809.91/369.02
  6. Step 6: Final answer
    x = 305.70

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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.