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Finding the Fourth Proportional to 619.95, 854.64 and 383.74

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Solution

The fourth proportional to 619.95, 854.64 and 383.74 is: 529.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.95 : 854.64 = 383.74 : x
  2. Step 2: Convert to fraction form
    619.95/854.64 = 383.74/x
  3. Step 3: Cross multiply
    619.95x = 854.64 × 383.74
  4. Step 4: Simplify right side
    619.95x = 327,959.55
  5. Step 5: Solve for x
    x = 327,959.55/619.95
  6. Step 6: Final answer
    x = 529.01

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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.