Home / 1,421.21-1,960.26-948.87

Finding the Fourth Proportional to 1,421.21, 1,960.26 and 948.87

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Solution

The fourth proportional to 1,421.21, 1,960.26 and 948.87 is: 1,308.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.21 : 1,960.26 = 948.87 : x
  2. Step 2: Convert to fraction form
    1,421.21/1,960.26 = 948.87/x
  3. Step 3: Cross multiply
    1,421.21x = 1,960.26 × 948.87
  4. Step 4: Simplify right side
    1,421.21x = 1,860,031.91
  5. Step 5: Solve for x
    x = 1,860,031.91/1,421.21
  6. Step 6: Final answer
    x = 1,308.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.