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Finding the Fourth Proportional to 619.02, 854.64 and 553.41

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Solution

The fourth proportional to 619.02, 854.64 and 553.41 is: 764.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.02 : 854.64 = 553.41 : x
  2. Step 2: Convert to fraction form
    619.02/854.64 = 553.41/x
  3. Step 3: Cross multiply
    619.02x = 854.64 × 553.41
  4. Step 4: Simplify right side
    619.02x = 472,966.32
  5. Step 5: Solve for x
    x = 472,966.32/619.02
  6. Step 6: Final answer
    x = 764.06

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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.