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Finding the Fourth Proportional to 934.14, 1,289.66 and 619.83

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Solution

The fourth proportional to 934.14, 1,289.66 and 619.83 is: 855.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.14 : 1,289.66 = 619.83 : x
  2. Step 2: Convert to fraction form
    934.14/1,289.66 = 619.83/x
  3. Step 3: Cross multiply
    934.14x = 1,289.66 × 619.83
  4. Step 4: Simplify right side
    934.14x = 799,366.86
  5. Step 5: Solve for x
    x = 799,366.86/934.14
  6. Step 6: Final answer
    x = 855.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.