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Finding the Fourth Proportional to 934.06, 1,400.64 and 385.84

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Solution

The fourth proportional to 934.06, 1,400.64 and 385.84 is: 578.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.06 : 1,400.64 = 385.84 : x
  2. Step 2: Convert to fraction form
    934.06/1,400.64 = 385.84/x
  3. Step 3: Cross multiply
    934.06x = 1,400.64 × 385.84
  4. Step 4: Simplify right side
    934.06x = 540,422.94
  5. Step 5: Solve for x
    x = 540,422.94/934.06
  6. Step 6: Final answer
    x = 578.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.