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Finding the Fourth Proportional to 3,345.40, 4,620.54 and 3,151

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Solution

The fourth proportional to 3,345.40, 4,620.54 and 3,151 is: 4,352.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,345.40 : 4,620.54 = 3,151 : x
  2. Step 2: Convert to fraction form
    3,345.40/4,620.54 = 3,151/x
  3. Step 3: Cross multiply
    3,345.40x = 4,620.54 × 3,151
  4. Step 4: Simplify right side
    3,345.40x = 14,559,321.54
  5. Step 5: Solve for x
    x = 14,559,321.54/3,345.40
  6. Step 6: Final answer
    x = 4,352.04

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1.5x scale

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.