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Finding the Fourth Proportional to 1,425.11, 1,966.68 and 835.66

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Solution

The fourth proportional to 1,425.11, 1,966.68 and 835.66 is: 1,153.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.11 : 1,966.68 = 835.66 : x
  2. Step 2: Convert to fraction form
    1,425.11/1,966.68 = 835.66/x
  3. Step 3: Cross multiply
    1,425.11x = 1,966.68 × 835.66
  4. Step 4: Simplify right side
    1,425.11x = 1,643,461.80
  5. Step 5: Solve for x
    x = 1,643,461.80/1,425.11
  6. Step 6: Final answer
    x = 1,153.22

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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.