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Finding the Fourth Proportional to 665.54, 997.50 and 340.74

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Solution

The fourth proportional to 665.54, 997.50 and 340.74 is: 510.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.54 : 997.50 = 340.74 : x
  2. Step 2: Convert to fraction form
    665.54/997.50 = 340.74/x
  3. Step 3: Cross multiply
    665.54x = 997.50 × 340.74
  4. Step 4: Simplify right side
    665.54x = 339,888.15
  5. Step 5: Solve for x
    x = 339,888.15/665.54
  6. Step 6: Final answer
    x = 510.70

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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.