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Finding the Fourth Proportional to 1,585.94, 2,379.29 and 660.98

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Solution

The fourth proportional to 1,585.94, 2,379.29 and 660.98 is: 991.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.94 : 2,379.29 = 660.98 : x
  2. Step 2: Convert to fraction form
    1,585.94/2,379.29 = 660.98/x
  3. Step 3: Cross multiply
    1,585.94x = 2,379.29 × 660.98
  4. Step 4: Simplify right side
    1,585.94x = 1,572,665.75
  5. Step 5: Solve for x
    x = 1,572,665.75/1,585.94
  6. Step 6: Final answer
    x = 991.63

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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.