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Finding the Fourth Proportional to 3,153.80, 4,730.70 and 845.30

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Solution

The fourth proportional to 3,153.80, 4,730.70 and 845.30 is: 1,267.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,153.80 : 4,730.70 = 845.30 : x
  2. Step 2: Convert to fraction form
    3,153.80/4,730.70 = 845.30/x
  3. Step 3: Cross multiply
    3,153.80x = 4,730.70 × 845.30
  4. Step 4: Simplify right side
    3,153.80x = 3,998,860.71
  5. Step 5: Solve for x
    x = 3,998,860.71/3,153.80
  6. Step 6: Final answer
    x = 1,267.95

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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.