Home / 1,439.32-2,158.62-465.40

Finding the Fourth Proportional to 1,439.32, 2,158.62 and 465.40

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Solution

The fourth proportional to 1,439.32, 2,158.62 and 465.40 is: 697.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.32 : 2,158.62 = 465.40 : x
  2. Step 2: Convert to fraction form
    1,439.32/2,158.62 = 465.40/x
  3. Step 3: Cross multiply
    1,439.32x = 2,158.62 × 465.40
  4. Step 4: Simplify right side
    1,439.32x = 1,004,621.75
  5. Step 5: Solve for x
    x = 1,004,621.75/1,439.32
  6. Step 6: Final answer
    x = 697.98

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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.