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Finding the Fourth Proportional to 1,585.69, 2,379.14 and 719.41

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Solution

The fourth proportional to 1,585.69, 2,379.14 and 719.41 is: 1,079.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.69 : 2,379.14 = 719.41 : x
  2. Step 2: Convert to fraction form
    1,585.69/2,379.14 = 719.41/x
  3. Step 3: Cross multiply
    1,585.69x = 2,379.14 × 719.41
  4. Step 4: Simplify right side
    1,585.69x = 1,711,577.11
  5. Step 5: Solve for x
    x = 1,711,577.11/1,585.69
  6. Step 6: Final answer
    x = 1,079.39

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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.