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Finding the Fourth Proportional to 515.76, 711.99 and 349.98

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Solution

The fourth proportional to 515.76, 711.99 and 349.98 is: 483.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.76 : 711.99 = 349.98 : x
  2. Step 2: Convert to fraction form
    515.76/711.99 = 349.98/x
  3. Step 3: Cross multiply
    515.76x = 711.99 × 349.98
  4. Step 4: Simplify right side
    515.76x = 249,182.26
  5. Step 5: Solve for x
    x = 249,182.26/515.76
  6. Step 6: Final answer
    x = 483.14

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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.