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Finding the Fourth Proportional to 1,140.45, 1,711.16 and 555.96

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Solution

The fourth proportional to 1,140.45, 1,711.16 and 555.96 is: 834.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.45 : 1,711.16 = 555.96 : x
  2. Step 2: Convert to fraction form
    1,140.45/1,711.16 = 555.96/x
  3. Step 3: Cross multiply
    1,140.45x = 1,711.16 × 555.96
  4. Step 4: Simplify right side
    1,140.45x = 951,342.24
  5. Step 5: Solve for x
    x = 951,342.24/1,140.45
  6. Step 6: Final answer
    x = 834.18

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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.