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Finding the Fourth Proportional to 4,605.71, 6,908.63 and 1,318.80

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Solution

The fourth proportional to 4,605.71, 6,908.63 and 1,318.80 is: 1,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,605.71 : 6,908.63 = 1,318.80 : x
  2. Step 2: Convert to fraction form
    4,605.71/6,908.63 = 1,318.80/x
  3. Step 3: Cross multiply
    4,605.71x = 6,908.63 × 1,318.80
  4. Step 4: Simplify right side
    4,605.71x = 9,111,101.24
  5. Step 5: Solve for x
    x = 9,111,101.24/4,605.71
  6. Step 6: Final answer
    x = 1,978.22

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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.