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Finding the Fourth Proportional to 537.93, 807.30 and 485.55

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Solution

The fourth proportional to 537.93, 807.30 and 485.55 is: 728.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.93 : 807.30 = 485.55 : x
  2. Step 2: Convert to fraction form
    537.93/807.30 = 485.55/x
  3. Step 3: Cross multiply
    537.93x = 807.30 × 485.55
  4. Step 4: Simplify right side
    537.93x = 391,984.52
  5. Step 5: Solve for x
    x = 391,984.52/537.93
  6. Step 6: Final answer
    x = 728.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.