Home / 1,439.42-2,155.75-706.64

Finding the Fourth Proportional to 1,439.42, 2,155.75 and 706.64

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Solution

The fourth proportional to 1,439.42, 2,155.75 and 706.64 is: 1,058.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.42 : 2,155.75 = 706.64 : x
  2. Step 2: Convert to fraction form
    1,439.42/2,155.75 = 706.64/x
  3. Step 3: Cross multiply
    1,439.42x = 2,155.75 × 706.64
  4. Step 4: Simplify right side
    1,439.42x = 1,523,326.63
  5. Step 5: Solve for x
    x = 1,523,326.63/1,439.42
  6. Step 6: Final answer
    x = 1,058.30

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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.