Home / 1,582.53-2,373.78-428.28

Finding the Fourth Proportional to 1,582.53, 2,373.78 and 428.28

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Solution

The fourth proportional to 1,582.53, 2,373.78 and 428.28 is: 642.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,582.53 : 2,373.78 = 428.28 : x
  2. Step 2: Convert to fraction form
    1,582.53/2,373.78 = 428.28/x
  3. Step 3: Cross multiply
    1,582.53x = 2,373.78 × 428.28
  4. Step 4: Simplify right side
    1,582.53x = 1,016,635.20
  5. Step 5: Solve for x
    x = 1,016,635.20/1,582.53
  6. Step 6: Final answer
    x = 642.41

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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.