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Finding the Fourth Proportional to 1,069.98, 1,604.70 and 723.12

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Solution

The fourth proportional to 1,069.98, 1,604.70 and 723.12 is: 1,084.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.98 : 1,604.70 = 723.12 : x
  2. Step 2: Convert to fraction form
    1,069.98/1,604.70 = 723.12/x
  3. Step 3: Cross multiply
    1,069.98x = 1,604.70 × 723.12
  4. Step 4: Simplify right side
    1,069.98x = 1,160,390.66
  5. Step 5: Solve for x
    x = 1,160,390.66/1,069.98
  6. Step 6: Final answer
    x = 1,084.50

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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.