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Finding the Fourth Proportional to 802.27, 1,201.47 and 390.09

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Solution

The fourth proportional to 802.27, 1,201.47 and 390.09 is: 584.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.27 : 1,201.47 = 390.09 : x
  2. Step 2: Convert to fraction form
    802.27/1,201.47 = 390.09/x
  3. Step 3: Cross multiply
    802.27x = 1,201.47 × 390.09
  4. Step 4: Simplify right side
    802.27x = 468,681.43
  5. Step 5: Solve for x
    x = 468,681.43/802.27
  6. Step 6: Final answer
    x = 584.19

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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.