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Finding the Fourth Proportional to 776.05, 1,164.84 and 631.50

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Solution

The fourth proportional to 776.05, 1,164.84 and 631.50 is: 947.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.05 : 1,164.84 = 631.50 : x
  2. Step 2: Convert to fraction form
    776.05/1,164.84 = 631.50/x
  3. Step 3: Cross multiply
    776.05x = 1,164.84 × 631.50
  4. Step 4: Simplify right side
    776.05x = 735,600.04
  5. Step 5: Solve for x
    x = 735,600.04/776.05
  6. Step 6: Final answer
    x = 947.88

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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.