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Finding the Fourth Proportional to 776.35, 1,163.35 and 612.01

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Solution

The fourth proportional to 776.35, 1,163.35 and 612.01 is: 917.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.35 : 1,163.35 = 612.01 : x
  2. Step 2: Convert to fraction form
    776.35/1,163.35 = 612.01/x
  3. Step 3: Cross multiply
    776.35x = 1,163.35 × 612.01
  4. Step 4: Simplify right side
    776.35x = 711,981.83
  5. Step 5: Solve for x
    x = 711,981.83/776.35
  6. Step 6: Final answer
    x = 917.09

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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.