Home / 1,439.32-2,158.95-399.33

Finding the Fourth Proportional to 1,439.32, 2,158.95 and 399.33

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Solution

The fourth proportional to 1,439.32, 2,158.95 and 399.33 is: 598.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.32 : 2,158.95 = 399.33 : x
  2. Step 2: Convert to fraction form
    1,439.32/2,158.95 = 399.33/x
  3. Step 3: Cross multiply
    1,439.32x = 2,158.95 × 399.33
  4. Step 4: Simplify right side
    1,439.32x = 862,126.91
  5. Step 5: Solve for x
    x = 862,126.91/1,439.32
  6. Step 6: Final answer
    x = 598.98

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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.