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Finding the Fourth Proportional to 1,425, 1,966.20 and 835.58

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Solution

The fourth proportional to 1,425, 1,966.20 and 835.58 is: 1,152.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425 : 1,966.20 = 835.58 : x
  2. Step 2: Convert to fraction form
    1,425/1,966.20 = 835.58/x
  3. Step 3: Cross multiply
    1,425x = 1,966.20 × 835.58
  4. Step 4: Simplify right side
    1,425x = 1,642,917.40
  5. Step 5: Solve for x
    x = 1,642,917.40/1,425
  6. Step 6: Final answer
    x = 1,152.92

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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.