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Finding the Fourth Proportional to 518.04, 714.93 and 285.18

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Solution

The fourth proportional to 518.04, 714.93 and 285.18 is: 393.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.04 : 714.93 = 285.18 : x
  2. Step 2: Convert to fraction form
    518.04/714.93 = 285.18/x
  3. Step 3: Cross multiply
    518.04x = 714.93 × 285.18
  4. Step 4: Simplify right side
    518.04x = 203,883.74
  5. Step 5: Solve for x
    x = 203,883.74/518.04
  6. Step 6: Final answer
    x = 393.57

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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.