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Finding the Fourth Proportional to 920.33, 1,270.07 and 500.69

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Solution

The fourth proportional to 920.33, 1,270.07 and 500.69 is: 690.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.33 : 1,270.07 = 500.69 : x
  2. Step 2: Convert to fraction form
    920.33/1,270.07 = 500.69/x
  3. Step 3: Cross multiply
    920.33x = 1,270.07 × 500.69
  4. Step 4: Simplify right side
    920.33x = 635,915.78
  5. Step 5: Solve for x
    x = 635,915.78/920.33
  6. Step 6: Final answer
    x = 690.97

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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.