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Finding the Fourth Proportional to 535.15, 738.62 and 485.11

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Solution

The fourth proportional to 535.15, 738.62 and 485.11 is: 669.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.15 : 738.62 = 485.11 : x
  2. Step 2: Convert to fraction form
    535.15/738.62 = 485.11/x
  3. Step 3: Cross multiply
    535.15x = 738.62 × 485.11
  4. Step 4: Simplify right side
    535.15x = 358,309.52
  5. Step 5: Solve for x
    x = 358,309.52/535.15
  6. Step 6: Final answer
    x = 669.55

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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.