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Finding the Fourth Proportional to 1,489.36, 2,053.97 and 929.88

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Solution

The fourth proportional to 1,489.36, 2,053.97 and 929.88 is: 1,282.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.36 : 2,053.97 = 929.88 : x
  2. Step 2: Convert to fraction form
    1,489.36/2,053.97 = 929.88/x
  3. Step 3: Cross multiply
    1,489.36x = 2,053.97 × 929.88
  4. Step 4: Simplify right side
    1,489.36x = 1,909,945.62
  5. Step 5: Solve for x
    x = 1,909,945.62/1,489.36
  6. Step 6: Final answer
    x = 1,282.39

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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.