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Finding the Fourth Proportional to 356.12, 531.54 and 340.31

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Solution

The fourth proportional to 356.12, 531.54 and 340.31 is: 507.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.12 : 531.54 = 340.31 : x
  2. Step 2: Convert to fraction form
    356.12/531.54 = 340.31/x
  3. Step 3: Cross multiply
    356.12x = 531.54 × 340.31
  4. Step 4: Simplify right side
    356.12x = 180,888.38
  5. Step 5: Solve for x
    x = 180,888.38/356.12
  6. Step 6: Final answer
    x = 507.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.