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Finding the Fourth Proportional to 505.80, 757.98 and 351.40

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Solution

The fourth proportional to 505.80, 757.98 and 351.40 is: 526.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.80 : 757.98 = 351.40 : x
  2. Step 2: Convert to fraction form
    505.80/757.98 = 351.40/x
  3. Step 3: Cross multiply
    505.80x = 757.98 × 351.40
  4. Step 4: Simplify right side
    505.80x = 266,354.17
  5. Step 5: Solve for x
    x = 266,354.17/505.80
  6. Step 6: Final answer
    x = 526.60

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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.