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Finding the Fourth Proportional to 1,656.40, 2,285.48 and 957.68

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Solution

The fourth proportional to 1,656.40, 2,285.48 and 957.68 is: 1,321.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,656.40 : 2,285.48 = 957.68 : x
  2. Step 2: Convert to fraction form
    1,656.40/2,285.48 = 957.68/x
  3. Step 3: Cross multiply
    1,656.40x = 2,285.48 × 957.68
  4. Step 4: Simplify right side
    1,656.40x = 2,188,758.49
  5. Step 5: Solve for x
    x = 2,188,758.49/1,656.40
  6. Step 6: Final answer
    x = 1,321.39

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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.