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Finding the Fourth Proportional to 1,555.09, 2,330.99 and 514.83

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Solution

The fourth proportional to 1,555.09, 2,330.99 and 514.83 is: 771.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.09 : 2,330.99 = 514.83 : x
  2. Step 2: Convert to fraction form
    1,555.09/2,330.99 = 514.83/x
  3. Step 3: Cross multiply
    1,555.09x = 2,330.99 × 514.83
  4. Step 4: Simplify right side
    1,555.09x = 1,200,051.93
  5. Step 5: Solve for x
    x = 1,200,051.93/1,555.09
  6. Step 6: Final answer
    x = 771.69

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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.