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Finding the Fourth Proportional to 1,139.19, 1,709.00 and 522.96

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Solution

The fourth proportional to 1,139.19, 1,709.00 and 522.96 is: 784.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.19 : 1,709.00 = 522.96 : x
  2. Step 2: Convert to fraction form
    1,139.19/1,709.00 = 522.96/x
  3. Step 3: Cross multiply
    1,139.19x = 1,709.00 × 522.96
  4. Step 4: Simplify right side
    1,139.19x = 893,736.03
  5. Step 5: Solve for x
    x = 893,736.03/1,139.19
  6. Step 6: Final answer
    x = 784.54

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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.