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Finding the Fourth Proportional to 784.39, 1,081.83 and 504.65

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Solution

The fourth proportional to 784.39, 1,081.83 and 504.65 is: 696.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.39 : 1,081.83 = 504.65 : x
  2. Step 2: Convert to fraction form
    784.39/1,081.83 = 504.65/x
  3. Step 3: Cross multiply
    784.39x = 1,081.83 × 504.65
  4. Step 4: Simplify right side
    784.39x = 545,945.51
  5. Step 5: Solve for x
    x = 545,945.51/784.39
  6. Step 6: Final answer
    x = 696.01

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Double scale
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1.5x scale

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.