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Finding the Fourth Proportional to 1,335.30, 1,842.66 and 775.79

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Solution

The fourth proportional to 1,335.30, 1,842.66 and 775.79 is: 1,070.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.30 : 1,842.66 = 775.79 : x
  2. Step 2: Convert to fraction form
    1,335.30/1,842.66 = 775.79/x
  3. Step 3: Cross multiply
    1,335.30x = 1,842.66 × 775.79
  4. Step 4: Simplify right side
    1,335.30x = 1,429,507.99
  5. Step 5: Solve for x
    x = 1,429,507.99/1,335.30
  6. Step 6: Final answer
    x = 1,070.55

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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.