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Finding the Fourth Proportional to 665.04, 997.74 and 340.35

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Solution

The fourth proportional to 665.04, 997.74 and 340.35 is: 510.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.04 : 997.74 = 340.35 : x
  2. Step 2: Convert to fraction form
    665.04/997.74 = 340.35/x
  3. Step 3: Cross multiply
    665.04x = 997.74 × 340.35
  4. Step 4: Simplify right side
    665.04x = 339,580.81
  5. Step 5: Solve for x
    x = 339,580.81/665.04
  6. Step 6: Final answer
    x = 510.62

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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.