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Finding the Fourth Proportional to 1,201.59, 1,802.39 and 928.08

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Solution

The fourth proportional to 1,201.59, 1,802.39 and 928.08 is: 1,392.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.59 : 1,802.39 = 928.08 : x
  2. Step 2: Convert to fraction form
    1,201.59/1,802.39 = 928.08/x
  3. Step 3: Cross multiply
    1,201.59x = 1,802.39 × 928.08
  4. Step 4: Simplify right side
    1,201.59x = 1,672,757.47
  5. Step 5: Solve for x
    x = 1,672,757.47/1,201.59
  6. Step 6: Final answer
    x = 1,392.12

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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.