Home / 1,479.28-2,219.36-439.32

Finding the Fourth Proportional to 1,479.28, 2,219.36 and 439.32

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Solution

The fourth proportional to 1,479.28, 2,219.36 and 439.32 is: 659.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.28 : 2,219.36 = 439.32 : x
  2. Step 2: Convert to fraction form
    1,479.28/2,219.36 = 439.32/x
  3. Step 3: Cross multiply
    1,479.28x = 2,219.36 × 439.32
  4. Step 4: Simplify right side
    1,479.28x = 975,009.24
  5. Step 5: Solve for x
    x = 975,009.24/1,479.28
  6. Step 6: Final answer
    x = 659.11

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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.