Home / 1,531.40-2,113.36-941.72

Finding the Fourth Proportional to 1,531.40, 2,113.36 and 941.72

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Solution

The fourth proportional to 1,531.40, 2,113.36 and 941.72 is: 1,299.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.40 : 2,113.36 = 941.72 : x
  2. Step 2: Convert to fraction form
    1,531.40/2,113.36 = 941.72/x
  3. Step 3: Cross multiply
    1,531.40x = 2,113.36 × 941.72
  4. Step 4: Simplify right side
    1,531.40x = 1,990,193.38
  5. Step 5: Solve for x
    x = 1,990,193.38/1,531.40
  6. Step 6: Final answer
    x = 1,299.59

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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.