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Finding the Fourth Proportional to 1,317.92, 1,819.12 and 794.40

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Solution

The fourth proportional to 1,317.92, 1,819.12 and 794.40 is: 1,096.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.92 : 1,819.12 = 794.40 : x
  2. Step 2: Convert to fraction form
    1,317.92/1,819.12 = 794.40/x
  3. Step 3: Cross multiply
    1,317.92x = 1,819.12 × 794.40
  4. Step 4: Simplify right side
    1,317.92x = 1,445,108.93
  5. Step 5: Solve for x
    x = 1,445,108.93/1,317.92
  6. Step 6: Final answer
    x = 1,096.51

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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.