Home / 1,439.36-1,985.76-880.64

Finding the Fourth Proportional to 1,439.36, 1,985.76 and 880.64

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Solution

The fourth proportional to 1,439.36, 1,985.76 and 880.64 is: 1,214.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.36 : 1,985.76 = 880.64 : x
  2. Step 2: Convert to fraction form
    1,439.36/1,985.76 = 880.64/x
  3. Step 3: Cross multiply
    1,439.36x = 1,985.76 × 880.64
  4. Step 4: Simplify right side
    1,439.36x = 1,748,739.69
  5. Step 5: Solve for x
    x = 1,748,739.69/1,439.36
  6. Step 6: Final answer
    x = 1,214.94

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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.