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Finding the Fourth Proportional to 515.12, 710.86 and 294.07

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Solution

The fourth proportional to 515.12, 710.86 and 294.07 is: 405.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.12 : 710.86 = 294.07 : x
  2. Step 2: Convert to fraction form
    515.12/710.86 = 294.07/x
  3. Step 3: Cross multiply
    515.12x = 710.86 × 294.07
  4. Step 4: Simplify right side
    515.12x = 209,040.09
  5. Step 5: Solve for x
    x = 209,040.09/515.12
  6. Step 6: Final answer
    x = 405.81

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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.