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Finding the Fourth Proportional to 357.30, 492.84 and 283.50

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Solution

The fourth proportional to 357.30, 492.84 and 283.50 is: 391.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.30 : 492.84 = 283.50 : x
  2. Step 2: Convert to fraction form
    357.30/492.84 = 283.50/x
  3. Step 3: Cross multiply
    357.30x = 492.84 × 283.50
  4. Step 4: Simplify right side
    357.30x = 139,720.14
  5. Step 5: Solve for x
    x = 139,720.14/357.30
  6. Step 6: Final answer
    x = 391.04

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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.