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Finding the Fourth Proportional to 1,694.32, 2,539.76 and 770.53

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Solution

The fourth proportional to 1,694.32, 2,539.76 and 770.53 is: 1,155.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,694.32 : 2,539.76 = 770.53 : x
  2. Step 2: Convert to fraction form
    1,694.32/2,539.76 = 770.53/x
  3. Step 3: Cross multiply
    1,694.32x = 2,539.76 × 770.53
  4. Step 4: Simplify right side
    1,694.32x = 1,956,955.83
  5. Step 5: Solve for x
    x = 1,956,955.83/1,694.32
  6. Step 6: Final answer
    x = 1,155.01

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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.