Home / 1,421.23-1,960.95-948.55

Finding the Fourth Proportional to 1,421.23, 1,960.95 and 948.55

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Solution

The fourth proportional to 1,421.23, 1,960.95 and 948.55 is: 1,308.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.23 : 1,960.95 = 948.55 : x
  2. Step 2: Convert to fraction form
    1,421.23/1,960.95 = 948.55/x
  3. Step 3: Cross multiply
    1,421.23x = 1,960.95 × 948.55
  4. Step 4: Simplify right side
    1,421.23x = 1,860,059.12
  5. Step 5: Solve for x
    x = 1,860,059.12/1,421.23
  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.