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Finding the Fourth Proportional to 1,289.10, 1,934.06 and 1,059.06

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Solution

The fourth proportional to 1,289.10, 1,934.06 and 1,059.06 is: 1,588.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.10 : 1,934.06 = 1,059.06 : x
  2. Step 2: Convert to fraction form
    1,289.10/1,934.06 = 1,059.06/x
  3. Step 3: Cross multiply
    1,289.10x = 1,934.06 × 1,059.06
  4. Step 4: Simplify right side
    1,289.10x = 2,048,280.29
  5. Step 5: Solve for x
    x = 2,048,280.29/1,289.10
  6. Step 6: Final answer
    x = 1,588.92

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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.