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Finding the Fourth Proportional to 785.00, 1,177.70 and 297.79

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Solution

The fourth proportional to 785.00, 1,177.70 and 297.79 is: 446.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.00 : 1,177.70 = 297.79 : x
  2. Step 2: Convert to fraction form
    785.00/1,177.70 = 297.79/x
  3. Step 3: Cross multiply
    785.00x = 1,177.70 × 297.79
  4. Step 4: Simplify right side
    785.00x = 350,705.08
  5. Step 5: Solve for x
    x = 350,705.08/785.00
  6. Step 6: Final answer
    x = 446.76

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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.