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Finding the Fourth Proportional to 1,269.60, 1,903.08 and 538.56

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Solution

The fourth proportional to 1,269.60, 1,903.08 and 538.56 is: 807.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.60 : 1,903.08 = 538.56 : x
  2. Step 2: Convert to fraction form
    1,269.60/1,903.08 = 538.56/x
  3. Step 3: Cross multiply
    1,269.60x = 1,903.08 × 538.56
  4. Step 4: Simplify right side
    1,269.60x = 1,024,922.76
  5. Step 5: Solve for x
    x = 1,024,922.76/1,269.60
  6. Step 6: Final answer
    x = 807.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.