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Finding the Fourth Proportional to 1,319.94, 1,819.53 and 876.87

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Solution

The fourth proportional to 1,319.94, 1,819.53 and 876.87 is: 1,208.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.94 : 1,819.53 = 876.87 : x
  2. Step 2: Convert to fraction form
    1,319.94/1,819.53 = 876.87/x
  3. Step 3: Cross multiply
    1,319.94x = 1,819.53 × 876.87
  4. Step 4: Simplify right side
    1,319.94x = 1,595,491.27
  5. Step 5: Solve for x
    x = 1,595,491.27/1,319.94
  6. Step 6: Final answer
    x = 1,208.76

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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.