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Finding the Fourth Proportional to 1,558.68, 2,151.36 and 968.88

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Solution

The fourth proportional to 1,558.68, 2,151.36 and 968.88 is: 1,337.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.68 : 2,151.36 = 968.88 : x
  2. Step 2: Convert to fraction form
    1,558.68/2,151.36 = 968.88/x
  3. Step 3: Cross multiply
    1,558.68x = 2,151.36 × 968.88
  4. Step 4: Simplify right side
    1,558.68x = 2,084,409.68
  5. Step 5: Solve for x
    x = 2,084,409.68/1,558.68
  6. Step 6: Final answer
    x = 1,337.29

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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.