Home / 1,211.18-1,672.37-930.98

Finding the Fourth Proportional to 1,211.18, 1,672.37 and 930.98

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Solution

The fourth proportional to 1,211.18, 1,672.37 and 930.98 is: 1,285.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.18 : 1,672.37 = 930.98 : x
  2. Step 2: Convert to fraction form
    1,211.18/1,672.37 = 930.98/x
  3. Step 3: Cross multiply
    1,211.18x = 1,672.37 × 930.98
  4. Step 4: Simplify right side
    1,211.18x = 1,556,943.02
  5. Step 5: Solve for x
    x = 1,556,943.02/1,211.18
  6. Step 6: Final answer
    x = 1,285.48

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1.5x scale

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.