Home / 2,117.85-3,176.87-947.66

Finding the Fourth Proportional to 2,117.85, 3,176.87 and 947.66

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Solution

The fourth proportional to 2,117.85, 3,176.87 and 947.66 is: 1,421.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.85 : 3,176.87 = 947.66 : x
  2. Step 2: Convert to fraction form
    2,117.85/3,176.87 = 947.66/x
  3. Step 3: Cross multiply
    2,117.85x = 3,176.87 × 947.66
  4. Step 4: Simplify right side
    2,117.85x = 3,010,572.00
  5. Step 5: Solve for x
    x = 3,010,572.00/2,117.85
  6. Step 6: Final answer
    x = 1,421.52

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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.