Home / 1,439.04-2,153.70-891.60

Finding the Fourth Proportional to 1,439.04, 2,153.70 and 891.60

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Solution

The fourth proportional to 1,439.04, 2,153.70 and 891.60 is: 1,334.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.04 : 2,153.70 = 891.60 : x
  2. Step 2: Convert to fraction form
    1,439.04/2,153.70 = 891.60/x
  3. Step 3: Cross multiply
    1,439.04x = 2,153.70 × 891.60
  4. Step 4: Simplify right side
    1,439.04x = 1,920,238.92
  5. Step 5: Solve for x
    x = 1,920,238.92/1,439.04
  6. Step 6: Final answer
    x = 1,334.39

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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.