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Finding the Fourth Proportional to 683.40, 1,025.10 and 510.60

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Solution

The fourth proportional to 683.40, 1,025.10 and 510.60 is: 765.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.40 : 1,025.10 = 510.60 : x
  2. Step 2: Convert to fraction form
    683.40/1,025.10 = 510.60/x
  3. Step 3: Cross multiply
    683.40x = 1,025.10 × 510.60
  4. Step 4: Simplify right side
    683.40x = 523,416.06
  5. Step 5: Solve for x
    x = 523,416.06/683.40
  6. Step 6: Final answer
    x = 765.90

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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.