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Finding the Fourth Proportional to 599.95, 827.55 and 390.04

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Solution

The fourth proportional to 599.95, 827.55 and 390.04 is: 538.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    599.95 : 827.55 = 390.04 : x
  2. Step 2: Convert to fraction form
    599.95/827.55 = 390.04/x
  3. Step 3: Cross multiply
    599.95x = 827.55 × 390.04
  4. Step 4: Simplify right side
    599.95x = 322,777.60
  5. Step 5: Solve for x
    x = 322,777.60/599.95
  6. Step 6: Final answer
    x = 538.01

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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.