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Finding the Fourth Proportional to 515.30, 773 and 190.70

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Solution

The fourth proportional to 515.30, 773 and 190.70 is: 286.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.30 : 773 = 190.70 : x
  2. Step 2: Convert to fraction form
    515.30/773 = 190.70/x
  3. Step 3: Cross multiply
    515.30x = 773 × 190.70
  4. Step 4: Simplify right side
    515.30x = 147,411.10
  5. Step 5: Solve for x
    x = 147,411.10/515.30
  6. Step 6: Final answer
    x = 286.07

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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.