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Finding the Fourth Proportional to 515.31, 710.81 and 316.04

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Solution

The fourth proportional to 515.31, 710.81 and 316.04 is: 435.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.31 : 710.81 = 316.04 : x
  2. Step 2: Convert to fraction form
    515.31/710.81 = 316.04/x
  3. Step 3: Cross multiply
    515.31x = 710.81 × 316.04
  4. Step 4: Simplify right side
    515.31x = 224,639.26
  5. Step 5: Solve for x
    x = 224,639.26/515.31
  6. Step 6: Final answer
    x = 435.93

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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.