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Finding the Fourth Proportional to 515.04, 710.01 and 318.21

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Solution

The fourth proportional to 515.04, 710.01 and 318.21 is: 438.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.04 : 710.01 = 318.21 : x
  2. Step 2: Convert to fraction form
    515.04/710.01 = 318.21/x
  3. Step 3: Cross multiply
    515.04x = 710.01 × 318.21
  4. Step 4: Simplify right side
    515.04x = 225,932.28
  5. Step 5: Solve for x
    x = 225,932.28/515.04
  6. Step 6: Final answer
    x = 438.67

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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.