Home / 1,411.08-2,117.50-680.74

Finding the Fourth Proportional to 1,411.08, 2,117.50 and 680.74

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Solution

The fourth proportional to 1,411.08, 2,117.50 and 680.74 is: 1,021.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.08 : 2,117.50 = 680.74 : x
  2. Step 2: Convert to fraction form
    1,411.08/2,117.50 = 680.74/x
  3. Step 3: Cross multiply
    1,411.08x = 2,117.50 × 680.74
  4. Step 4: Simplify right side
    1,411.08x = 1,441,466.95
  5. Step 5: Solve for x
    x = 1,441,466.95/1,411.08
  6. Step 6: Final answer
    x = 1,021.53

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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.