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Finding the Fourth Proportional to 1,068.54, 1,474.54 and 788.68

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Solution

The fourth proportional to 1,068.54, 1,474.54 and 788.68 is: 1,088.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.54 : 1,474.54 = 788.68 : x
  2. Step 2: Convert to fraction form
    1,068.54/1,474.54 = 788.68/x
  3. Step 3: Cross multiply
    1,068.54x = 1,474.54 × 788.68
  4. Step 4: Simplify right side
    1,068.54x = 1,162,932.83
  5. Step 5: Solve for x
    x = 1,162,932.83/1,068.54
  6. Step 6: Final answer
    x = 1,088.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.