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Finding the Fourth Proportional to 994.94, 1,492.57 and 345.86

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Solution

The fourth proportional to 994.94, 1,492.57 and 345.86 is: 518.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.94 : 1,492.57 = 345.86 : x
  2. Step 2: Convert to fraction form
    994.94/1,492.57 = 345.86/x
  3. Step 3: Cross multiply
    994.94x = 1,492.57 × 345.86
  4. Step 4: Simplify right side
    994.94x = 516,220.26
  5. Step 5: Solve for x
    x = 516,220.26/994.94
  6. Step 6: Final answer
    x = 518.85

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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.