Home / 1,521.19-2,281.51-425.67

Finding the Fourth Proportional to 1,521.19, 2,281.51 and 425.67

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Solution

The fourth proportional to 1,521.19, 2,281.51 and 425.67 is: 638.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.19 : 2,281.51 = 425.67 : x
  2. Step 2: Convert to fraction form
    1,521.19/2,281.51 = 425.67/x
  3. Step 3: Cross multiply
    1,521.19x = 2,281.51 × 425.67
  4. Step 4: Simplify right side
    1,521.19x = 971,170.36
  5. Step 5: Solve for x
    x = 971,170.36/1,521.19
  6. Step 6: Final answer
    x = 638.43

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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.