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Finding the Fourth Proportional to 1,751.46, 2,628.40 and 656.70

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Solution

The fourth proportional to 1,751.46, 2,628.40 and 656.70 is: 985.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,751.46 : 2,628.40 = 656.70 : x
  2. Step 2: Convert to fraction form
    1,751.46/2,628.40 = 656.70/x
  3. Step 3: Cross multiply
    1,751.46x = 2,628.40 × 656.70
  4. Step 4: Simplify right side
    1,751.46x = 1,726,070.28
  5. Step 5: Solve for x
    x = 1,726,070.28/1,751.46
  6. Step 6: Final answer
    x = 985.50

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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.