Home / 1,418.29-2,124.67-929.86

Finding the Fourth Proportional to 1,418.29, 2,124.67 and 929.86

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Solution

The fourth proportional to 1,418.29, 2,124.67 and 929.86 is: 1,392.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.29 : 2,124.67 = 929.86 : x
  2. Step 2: Convert to fraction form
    1,418.29/2,124.67 = 929.86/x
  3. Step 3: Cross multiply
    1,418.29x = 2,124.67 × 929.86
  4. Step 4: Simplify right side
    1,418.29x = 1,975,645.65
  5. Step 5: Solve for x
    x = 1,975,645.65/1,418.29
  6. Step 6: Final answer
    x = 1,392.98

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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.