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Finding the Fourth Proportional to 3,140.39, 4,710.54 and 768.49

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Solution

The fourth proportional to 3,140.39, 4,710.54 and 768.49 is: 1,152.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.39 : 4,710.54 = 768.49 : x
  2. Step 2: Convert to fraction form
    3,140.39/4,710.54 = 768.49/x
  3. Step 3: Cross multiply
    3,140.39x = 4,710.54 × 768.49
  4. Step 4: Simplify right side
    3,140.39x = 3,619,991.11
  5. Step 5: Solve for x
    x = 3,619,991.11/3,140.39
  6. Step 6: Final answer
    x = 1,152.72

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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.