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Finding the Fourth Proportional to 881.63, 1,320.10 and 770.93

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Solution

The fourth proportional to 881.63, 1,320.10 and 770.93 is: 1,154.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.63 : 1,320.10 = 770.93 : x
  2. Step 2: Convert to fraction form
    881.63/1,320.10 = 770.93/x
  3. Step 3: Cross multiply
    881.63x = 1,320.10 × 770.93
  4. Step 4: Simplify right side
    881.63x = 1,017,704.69
  5. Step 5: Solve for x
    x = 1,017,704.69/881.63
  6. Step 6: Final answer
    x = 1,154.34

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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.