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Finding the Fourth Proportional to 802.02, 1,202.32 and 339.72

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Solution

The fourth proportional to 802.02, 1,202.32 and 339.72 is: 509.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.02 : 1,202.32 = 339.72 : x
  2. Step 2: Convert to fraction form
    802.02/1,202.32 = 339.72/x
  3. Step 3: Cross multiply
    802.02x = 1,202.32 × 339.72
  4. Step 4: Simplify right side
    802.02x = 408,452.15
  5. Step 5: Solve for x
    x = 408,452.15/802.02
  6. Step 6: Final answer
    x = 509.28

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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.