Home / 1,384.19-2,076.28-434.43

Finding the Fourth Proportional to 1,384.19, 2,076.28 and 434.43

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Solution

The fourth proportional to 1,384.19, 2,076.28 and 434.43 is: 651.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.19 : 2,076.28 = 434.43 : x
  2. Step 2: Convert to fraction form
    1,384.19/2,076.28 = 434.43/x
  3. Step 3: Cross multiply
    1,384.19x = 2,076.28 × 434.43
  4. Step 4: Simplify right side
    1,384.19x = 901,990.92
  5. Step 5: Solve for x
    x = 901,990.92/1,384.19
  6. Step 6: Final answer
    x = 651.64

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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.