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Finding the Fourth Proportional to 680.80, 934.28 and 637.60

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Solution

The fourth proportional to 680.80, 934.28 and 637.60 is: 875.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.80 : 934.28 = 637.60 : x
  2. Step 2: Convert to fraction form
    680.80/934.28 = 637.60/x
  3. Step 3: Cross multiply
    680.80x = 934.28 × 637.60
  4. Step 4: Simplify right side
    680.80x = 595,696.93
  5. Step 5: Solve for x
    x = 595,696.93/680.80
  6. Step 6: Final answer
    x = 875.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.