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Finding the Fourth Proportional to 515.36, 710.72 and 340.80

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Solution

The fourth proportional to 515.36, 710.72 and 340.80 is: 469.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.36 : 710.72 = 340.80 : x
  2. Step 2: Convert to fraction form
    515.36/710.72 = 340.80/x
  3. Step 3: Cross multiply
    515.36x = 710.72 × 340.80
  4. Step 4: Simplify right side
    515.36x = 242,213.38
  5. Step 5: Solve for x
    x = 242,213.38/515.36
  6. Step 6: Final answer
    x = 469.99

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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.