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Finding the Fourth Proportional to 3,185.60, 4,778.52 and 877.04

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Solution

The fourth proportional to 3,185.60, 4,778.52 and 877.04 is: 1,315.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.60 : 4,778.52 = 877.04 : x
  2. Step 2: Convert to fraction form
    3,185.60/4,778.52 = 877.04/x
  3. Step 3: Cross multiply
    3,185.60x = 4,778.52 × 877.04
  4. Step 4: Simplify right side
    3,185.60x = 4,190,953.18
  5. Step 5: Solve for x
    x = 4,190,953.18/3,185.60
  6. Step 6: Final answer
    x = 1,315.59

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1.5x scale

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.