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Finding the Fourth Proportional to 515.79, 711.54 and 341.28

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Solution

The fourth proportional to 515.79, 711.54 and 341.28 is: 470.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.79 : 711.54 = 341.28 : x
  2. Step 2: Convert to fraction form
    515.79/711.54 = 341.28/x
  3. Step 3: Cross multiply
    515.79x = 711.54 × 341.28
  4. Step 4: Simplify right side
    515.79x = 242,834.37
  5. Step 5: Solve for x
    x = 242,834.37/515.79
  6. Step 6: Final answer
    x = 470.80

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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.