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Finding the Fourth Proportional to 802.70, 1,203.69 and 369.98

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Solution

The fourth proportional to 802.70, 1,203.69 and 369.98 is: 554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.70 : 1,203.69 = 369.98 : x
  2. Step 2: Convert to fraction form
    802.70/1,203.69 = 369.98/x
  3. Step 3: Cross multiply
    802.70x = 1,203.69 × 369.98
  4. Step 4: Simplify right side
    802.70x = 445,341.23
  5. Step 5: Solve for x
    x = 445,341.23/802.70
  6. Step 6: Final answer
    x = 554.80

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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.