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Finding the Fourth Proportional to 665.18, 918.42 and 468.96

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Solution

The fourth proportional to 665.18, 918.42 and 468.96 is: 647.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.18 : 918.42 = 468.96 : x
  2. Step 2: Convert to fraction form
    665.18/918.42 = 468.96/x
  3. Step 3: Cross multiply
    665.18x = 918.42 × 468.96
  4. Step 4: Simplify right side
    665.18x = 430,702.24
  5. Step 5: Solve for x
    x = 430,702.24/665.18
  6. Step 6: Final answer
    x = 647.50

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.