Home / 1,439.40-2,159.28-708.36

Finding the Fourth Proportional to 1,439.40, 2,159.28 and 708.36

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Solution

The fourth proportional to 1,439.40, 2,159.28 and 708.36 is: 1,062.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.40 : 2,159.28 = 708.36 : x
  2. Step 2: Convert to fraction form
    1,439.40/2,159.28 = 708.36/x
  3. Step 3: Cross multiply
    1,439.40x = 2,159.28 × 708.36
  4. Step 4: Simplify right side
    1,439.40x = 1,529,547.58
  5. Step 5: Solve for x
    x = 1,529,547.58/1,439.40
  6. Step 6: Final answer
    x = 1,062.63

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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.