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Finding the Fourth Proportional to 436.73, 603.05 and 390.02

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Solution

The fourth proportional to 436.73, 603.05 and 390.02 is: 538.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.73 : 603.05 = 390.02 : x
  2. Step 2: Convert to fraction form
    436.73/603.05 = 390.02/x
  3. Step 3: Cross multiply
    436.73x = 603.05 × 390.02
  4. Step 4: Simplify right side
    436.73x = 235,196.60
  5. Step 5: Solve for x
    x = 235,196.60/436.73
  6. Step 6: Final answer
    x = 538.55

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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.