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Finding the Fourth Proportional to 4,605.70, 6,908.62 and 1,318.90

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Solution

The fourth proportional to 4,605.70, 6,908.62 and 1,318.90 is: 1,978.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,605.70 : 6,908.62 = 1,318.90 : x
  2. Step 2: Convert to fraction form
    4,605.70/6,908.62 = 1,318.90/x
  3. Step 3: Cross multiply
    4,605.70x = 6,908.62 × 1,318.90
  4. Step 4: Simplify right side
    4,605.70x = 9,111,778.92
  5. Step 5: Solve for x
    x = 9,111,778.92/4,605.70
  6. Step 6: Final answer
    x = 1,978.37

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1.5x scale

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.