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Finding the Fourth Proportional to 3,607.35, 5,407.76 and 1,415.49

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Solution

The fourth proportional to 3,607.35, 5,407.76 and 1,415.49 is: 2,121.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,607.35 : 5,407.76 = 1,415.49 : x
  2. Step 2: Convert to fraction form
    3,607.35/5,407.76 = 1,415.49/x
  3. Step 3: Cross multiply
    3,607.35x = 5,407.76 × 1,415.49
  4. Step 4: Simplify right side
    3,607.35x = 7,654,630.20
  5. Step 5: Solve for x
    x = 7,654,630.20/3,607.35
  6. Step 6: Final answer
    x = 2,121.95

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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.