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Finding the Fourth Proportional to 1,425.30, 1,966.44 and 835.42

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Solution

The fourth proportional to 1,425.30, 1,966.44 and 835.42 is: 1,152.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.30 : 1,966.44 = 835.42 : x
  2. Step 2: Convert to fraction form
    1,425.30/1,966.44 = 835.42/x
  3. Step 3: Cross multiply
    1,425.30x = 1,966.44 × 835.42
  4. Step 4: Simplify right side
    1,425.30x = 1,642,793.47
  5. Step 5: Solve for x
    x = 1,642,793.47/1,425.30
  6. Step 6: Final answer
    x = 1,152.60

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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.