Home / 1,660.40-2,291.34-914.36

Finding the Fourth Proportional to 1,660.40, 2,291.34 and 914.36

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Solution

The fourth proportional to 1,660.40, 2,291.34 and 914.36 is: 1,261.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.40 : 2,291.34 = 914.36 : x
  2. Step 2: Convert to fraction form
    1,660.40/2,291.34 = 914.36/x
  3. Step 3: Cross multiply
    1,660.40x = 2,291.34 × 914.36
  4. Step 4: Simplify right side
    1,660.40x = 2,095,101.61
  5. Step 5: Solve for x
    x = 2,095,101.61/1,660.40
  6. Step 6: Final answer
    x = 1,261.81

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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.