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Finding the Fourth Proportional to 1,591.95, 2,388.45 and 770.32

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Solution

The fourth proportional to 1,591.95, 2,388.45 and 770.32 is: 1,155.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.95 : 2,388.45 = 770.32 : x
  2. Step 2: Convert to fraction form
    1,591.95/2,388.45 = 770.32/x
  3. Step 3: Cross multiply
    1,591.95x = 2,388.45 × 770.32
  4. Step 4: Simplify right side
    1,591.95x = 1,839,870.80
  5. Step 5: Solve for x
    x = 1,839,870.80/1,591.95
  6. Step 6: Final answer
    x = 1,155.73

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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.