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Finding the Fourth Proportional to 1,140.59, 1,709.50 and 482.21

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Solution

The fourth proportional to 1,140.59, 1,709.50 and 482.21 is: 722.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.59 : 1,709.50 = 482.21 : x
  2. Step 2: Convert to fraction form
    1,140.59/1,709.50 = 482.21/x
  3. Step 3: Cross multiply
    1,140.59x = 1,709.50 × 482.21
  4. Step 4: Simplify right side
    1,140.59x = 824,338.00
  5. Step 5: Solve for x
    x = 824,338.00/1,140.59
  6. Step 6: Final answer
    x = 722.73

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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.