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Finding the Fourth Proportional to 619.21, 854.53 and 339.46

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Solution

The fourth proportional to 619.21, 854.53 and 339.46 is: 468.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.21 : 854.53 = 339.46 : x
  2. Step 2: Convert to fraction form
    619.21/854.53 = 339.46/x
  3. Step 3: Cross multiply
    619.21x = 854.53 × 339.46
  4. Step 4: Simplify right side
    619.21x = 290,075.77
  5. Step 5: Solve for x
    x = 290,075.77/619.21
  6. Step 6: Final answer
    x = 468.46

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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.