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Finding the Fourth Proportional to 1,201.79, 1,802.39 and 432.29

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Solution

The fourth proportional to 1,201.79, 1,802.39 and 432.29 is: 648.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.79 : 1,802.39 = 432.29 : x
  2. Step 2: Convert to fraction form
    1,201.79/1,802.39 = 432.29/x
  3. Step 3: Cross multiply
    1,201.79x = 1,802.39 × 432.29
  4. Step 4: Simplify right side
    1,201.79x = 779,144.00
  5. Step 5: Solve for x
    x = 779,144.00/1,201.79
  6. Step 6: Final answer
    x = 648.32

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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.