Home / 1,039.10-1,429.65-788.96

Finding the Fourth Proportional to 1,039.10, 1,429.65 and 788.96

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Solution

The fourth proportional to 1,039.10, 1,429.65 and 788.96 is: 1,085.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.10 : 1,429.65 = 788.96 : x
  2. Step 2: Convert to fraction form
    1,039.10/1,429.65 = 788.96/x
  3. Step 3: Cross multiply
    1,039.10x = 1,429.65 × 788.96
  4. Step 4: Simplify right side
    1,039.10x = 1,127,940.24
  5. Step 5: Solve for x
    x = 1,127,940.24/1,039.10
  6. Step 6: Final answer
    x = 1,085.50

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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.