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Finding the Fourth Proportional to 3,340.80, 5,011.50 and 875.58

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Solution

The fourth proportional to 3,340.80, 5,011.50 and 875.58 is: 1,313.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,340.80 : 5,011.50 = 875.58 : x
  2. Step 2: Convert to fraction form
    3,340.80/5,011.50 = 875.58/x
  3. Step 3: Cross multiply
    3,340.80x = 5,011.50 × 875.58
  4. Step 4: Simplify right side
    3,340.80x = 4,387,969.17
  5. Step 5: Solve for x
    x = 4,387,969.17/3,340.80
  6. Step 6: Final answer
    x = 1,313.45

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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.