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Finding the Fourth Proportional to 515.40, 710.88 and 375.99

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Solution

The fourth proportional to 515.40, 710.88 and 375.99 is: 518.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.40 : 710.88 = 375.99 : x
  2. Step 2: Convert to fraction form
    515.40/710.88 = 375.99/x
  3. Step 3: Cross multiply
    515.40x = 710.88 × 375.99
  4. Step 4: Simplify right side
    515.40x = 267,283.77
  5. Step 5: Solve for x
    x = 267,283.77/515.40
  6. Step 6: Final answer
    x = 518.59

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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.