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Finding the Fourth Proportional to 1,379.03, 2,069.35 and 557.18

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Solution

The fourth proportional to 1,379.03, 2,069.35 and 557.18 is: 836.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.03 : 2,069.35 = 557.18 : x
  2. Step 2: Convert to fraction form
    1,379.03/2,069.35 = 557.18/x
  3. Step 3: Cross multiply
    1,379.03x = 2,069.35 × 557.18
  4. Step 4: Simplify right side
    1,379.03x = 1,152,996.45
  5. Step 5: Solve for x
    x = 1,152,996.45/1,379.03
  6. Step 6: Final answer
    x = 836.10

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