Home / 1,440.24-1,987.58-880.64

Finding the Fourth Proportional to 1,440.24, 1,987.58 and 880.64

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Solution

The fourth proportional to 1,440.24, 1,987.58 and 880.64 is: 1,215.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.24 : 1,987.58 = 880.64 : x
  2. Step 2: Convert to fraction form
    1,440.24/1,987.58 = 880.64/x
  3. Step 3: Cross multiply
    1,440.24x = 1,987.58 × 880.64
  4. Step 4: Simplify right side
    1,440.24x = 1,750,342.45
  5. Step 5: Solve for x
    x = 1,750,342.45/1,440.24
  6. Step 6: Final answer
    x = 1,215.31

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1.5x scale

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.