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Finding the Fourth Proportional to 835.04, 1,252.64 and 257.76

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Solution

The fourth proportional to 835.04, 1,252.64 and 257.76 is: 386.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.04 : 1,252.64 = 257.76 : x
  2. Step 2: Convert to fraction form
    835.04/1,252.64 = 257.76/x
  3. Step 3: Cross multiply
    835.04x = 1,252.64 × 257.76
  4. Step 4: Simplify right side
    835.04x = 322,880.49
  5. Step 5: Solve for x
    x = 322,880.49/835.04
  6. Step 6: Final answer
    x = 386.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.