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Finding the Fourth Proportional to 3,153, 4,730.76 and 1,205.40

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Solution

The fourth proportional to 3,153, 4,730.76 and 1,205.40 is: 1,808.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,153 : 4,730.76 = 1,205.40 : x
  2. Step 2: Convert to fraction form
    3,153/4,730.76 = 1,205.40/x
  3. Step 3: Cross multiply
    3,153x = 4,730.76 × 1,205.40
  4. Step 4: Simplify right side
    3,153x = 5,702,458.10
  5. Step 5: Solve for x
    x = 5,702,458.10/3,153
  6. Step 6: Final answer
    x = 1,808.58

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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.