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Finding the Fourth Proportional to 1,336.79, 2,005.86 and 557.37

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Solution

The fourth proportional to 1,336.79, 2,005.86 and 557.37 is: 836.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.79 : 2,005.86 = 557.37 : x
  2. Step 2: Convert to fraction form
    1,336.79/2,005.86 = 557.37/x
  3. Step 3: Cross multiply
    1,336.79x = 2,005.86 × 557.37
  4. Step 4: Simplify right side
    1,336.79x = 1,118,006.19
  5. Step 5: Solve for x
    x = 1,118,006.19/1,336.79
  6. Step 6: Final answer
    x = 836.34

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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.