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Finding the Fourth Proportional to 920.37, 1,270.11 and 527.39

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Solution

The fourth proportional to 920.37, 1,270.11 and 527.39 is: 727.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.37 : 1,270.11 = 527.39 : x
  2. Step 2: Convert to fraction form
    920.37/1,270.11 = 527.39/x
  3. Step 3: Cross multiply
    920.37x = 1,270.11 × 527.39
  4. Step 4: Simplify right side
    920.37x = 669,843.31
  5. Step 5: Solve for x
    x = 669,843.31/920.37
  6. Step 6: Final answer
    x = 727.80

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1.5x scale

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.