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Finding the Fourth Proportional to 675.80, 938.99 and 675.80

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Solution

The fourth proportional to 675.80, 938.99 and 675.80 is: 938.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.80 : 938.99 = 675.80 : x
  2. Step 2: Convert to fraction form
    675.80/938.99 = 675.80/x
  3. Step 3: Cross multiply
    675.80x = 938.99 × 675.80
  4. Step 4: Simplify right side
    675.80x = 634,569.44
  5. Step 5: Solve for x
    x = 634,569.44/675.80
  6. Step 6: Final answer
    x = 938.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.