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Finding the Fourth Proportional to 785.08, 1,084.80 and 564.76

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Solution

The fourth proportional to 785.08, 1,084.80 and 564.76 is: 780.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.08 : 1,084.80 = 564.76 : x
  2. Step 2: Convert to fraction form
    785.08/1,084.80 = 564.76/x
  3. Step 3: Cross multiply
    785.08x = 1,084.80 × 564.76
  4. Step 4: Simplify right side
    785.08x = 612,651.65
  5. Step 5: Solve for x
    x = 612,651.65/785.08
  6. Step 6: Final answer
    x = 780.37

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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.