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Finding the Fourth Proportional to 679.94, 938.75 and 467.60

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Solution

The fourth proportional to 679.94, 938.75 and 467.60 is: 645.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.94 : 938.75 = 467.60 : x
  2. Step 2: Convert to fraction form
    679.94/938.75 = 467.60/x
  3. Step 3: Cross multiply
    679.94x = 938.75 × 467.60
  4. Step 4: Simplify right side
    679.94x = 438,957.75
  5. Step 5: Solve for x
    x = 438,957.75/679.94
  6. Step 6: Final answer
    x = 645.58

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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.