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Finding the Fourth Proportional to 1,239.13, 1,856.26 and 621.01

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Solution

The fourth proportional to 1,239.13, 1,856.26 and 621.01 is: 930.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.13 : 1,856.26 = 621.01 : x
  2. Step 2: Convert to fraction form
    1,239.13/1,856.26 = 621.01/x
  3. Step 3: Cross multiply
    1,239.13x = 1,856.26 × 621.01
  4. Step 4: Simplify right side
    1,239.13x = 1,152,743.64
  5. Step 5: Solve for x
    x = 1,152,743.64/1,239.13
  6. Step 6: Final answer
    x = 930.29

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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.