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Finding the Fourth Proportional to 515.18, 710.80 and 294.08

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Solution

The fourth proportional to 515.18, 710.80 and 294.08 is: 405.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.18 : 710.80 = 294.08 : x
  2. Step 2: Convert to fraction form
    515.18/710.80 = 294.08/x
  3. Step 3: Cross multiply
    515.18x = 710.80 × 294.08
  4. Step 4: Simplify right side
    515.18x = 209,032.06
  5. Step 5: Solve for x
    x = 209,032.06/515.18
  6. Step 6: Final answer
    x = 405.75

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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.