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Finding the Fourth Proportional to 619.55, 854.94 and 339.77

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Solution

The fourth proportional to 619.55, 854.94 and 339.77 is: 468.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.55 : 854.94 = 339.77 : x
  2. Step 2: Convert to fraction form
    619.55/854.94 = 339.77/x
  3. Step 3: Cross multiply
    619.55x = 854.94 × 339.77
  4. Step 4: Simplify right side
    619.55x = 290,486.38
  5. Step 5: Solve for x
    x = 290,486.38/619.55
  6. Step 6: Final answer
    x = 468.87

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1.5x scale

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.