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Finding the Fourth Proportional to 1,580.36, 2,180.48 and 950.76

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Solution

The fourth proportional to 1,580.36, 2,180.48 and 950.76 is: 1,311.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.36 : 2,180.48 = 950.76 : x
  2. Step 2: Convert to fraction form
    1,580.36/2,180.48 = 950.76/x
  3. Step 3: Cross multiply
    1,580.36x = 2,180.48 × 950.76
  4. Step 4: Simplify right side
    1,580.36x = 2,073,113.16
  5. Step 5: Solve for x
    x = 2,073,113.16/1,580.36
  6. Step 6: Final answer
    x = 1,311.80

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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.