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Finding the Fourth Proportional to 1,139.96, 1,709.94 and 524.11

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Solution

The fourth proportional to 1,139.96, 1,709.94 and 524.11 is: 786.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.96 : 1,709.94 = 524.11 : x
  2. Step 2: Convert to fraction form
    1,139.96/1,709.94 = 524.11/x
  3. Step 3: Cross multiply
    1,139.96x = 1,709.94 × 524.11
  4. Step 4: Simplify right side
    1,139.96x = 896,196.65
  5. Step 5: Solve for x
    x = 896,196.65/1,139.96
  6. Step 6: Final answer
    x = 786.17

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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.