Home / 1,521.36-2,281.56-425.64

Finding the Fourth Proportional to 1,521.36, 2,281.56 and 425.64

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Solution

The fourth proportional to 1,521.36, 2,281.56 and 425.64 is: 638.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.36 : 2,281.56 = 425.64 : x
  2. Step 2: Convert to fraction form
    1,521.36/2,281.56 = 425.64/x
  3. Step 3: Cross multiply
    1,521.36x = 2,281.56 × 425.64
  4. Step 4: Simplify right side
    1,521.36x = 971,123.20
  5. Step 5: Solve for x
    x = 971,123.20/1,521.36
  6. Step 6: Final answer
    x = 638.33

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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.