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Finding the Fourth Proportional to 492.67, 737.70 and 390.16

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Solution

The fourth proportional to 492.67, 737.70 and 390.16 is: 584.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.67 : 737.70 = 390.16 : x
  2. Step 2: Convert to fraction form
    492.67/737.70 = 390.16/x
  3. Step 3: Cross multiply
    492.67x = 737.70 × 390.16
  4. Step 4: Simplify right side
    492.67x = 287,821.03
  5. Step 5: Solve for x
    x = 287,821.03/492.67
  6. Step 6: Final answer
    x = 584.21

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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.