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Finding the Fourth Proportional to 346.57, 518.47 and 315.59

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Solution

The fourth proportional to 346.57, 518.47 and 315.59 is: 472.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.57 : 518.47 = 315.59 : x
  2. Step 2: Convert to fraction form
    346.57/518.47 = 315.59/x
  3. Step 3: Cross multiply
    346.57x = 518.47 × 315.59
  4. Step 4: Simplify right side
    346.57x = 163,620.57
  5. Step 5: Solve for x
    x = 163,620.57/346.57
  6. Step 6: Final answer
    x = 472.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.