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Finding the Fourth Proportional to 1,302.96, 1,798.20 and 798.80

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Solution

The fourth proportional to 1,302.96, 1,798.20 and 798.80 is: 1,102.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,302.96 : 1,798.20 = 798.80 : x
  2. Step 2: Convert to fraction form
    1,302.96/1,798.20 = 798.80/x
  3. Step 3: Cross multiply
    1,302.96x = 1,798.20 × 798.80
  4. Step 4: Simplify right side
    1,302.96x = 1,436,402.16
  5. Step 5: Solve for x
    x = 1,436,402.16/1,302.96
  6. Step 6: Final answer
    x = 1,102.41

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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.