Home / 1,331.40-1,838.14-859.46

Finding the Fourth Proportional to 1,331.40, 1,838.14 and 859.46

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Solution

The fourth proportional to 1,331.40, 1,838.14 and 859.46 is: 1,186.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.40 : 1,838.14 = 859.46 : x
  2. Step 2: Convert to fraction form
    1,331.40/1,838.14 = 859.46/x
  3. Step 3: Cross multiply
    1,331.40x = 1,838.14 × 859.46
  4. Step 4: Simplify right side
    1,331.40x = 1,579,807.80
  5. Step 5: Solve for x
    x = 1,579,807.80/1,331.40
  6. Step 6: Final answer
    x = 1,186.58

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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.