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Finding the Fourth Proportional to 934.34, 1,288.95 and 602.87

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Solution

The fourth proportional to 934.34, 1,288.95 and 602.87 is: 831.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.34 : 1,288.95 = 602.87 : x
  2. Step 2: Convert to fraction form
    934.34/1,288.95 = 602.87/x
  3. Step 3: Cross multiply
    934.34x = 1,288.95 × 602.87
  4. Step 4: Simplify right side
    934.34x = 777,067.68
  5. Step 5: Solve for x
    x = 777,067.68/934.34
  6. Step 6: Final answer
    x = 831.68

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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.