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Finding the Fourth Proportional to 679.26, 938.15 and 457.83

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Solution

The fourth proportional to 679.26, 938.15 and 457.83 is: 632.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.26 : 938.15 = 457.83 : x
  2. Step 2: Convert to fraction form
    679.26/938.15 = 457.83/x
  3. Step 3: Cross multiply
    679.26x = 938.15 × 457.83
  4. Step 4: Simplify right side
    679.26x = 429,510.93
  5. Step 5: Solve for x
    x = 429,510.93/679.26
  6. Step 6: Final answer
    x = 632.32

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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.