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Finding the Fourth Proportional to 847.95, 1,169.69 and 611.63

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Solution

The fourth proportional to 847.95, 1,169.69 and 611.63 is: 843.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.95 : 1,169.69 = 611.63 : x
  2. Step 2: Convert to fraction form
    847.95/1,169.69 = 611.63/x
  3. Step 3: Cross multiply
    847.95x = 1,169.69 × 611.63
  4. Step 4: Simplify right side
    847.95x = 715,417.36
  5. Step 5: Solve for x
    x = 715,417.36/847.95
  6. Step 6: Final answer
    x = 843.70

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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.