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Finding the Fourth Proportional to 666.29, 918.35 and 467.18

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Solution

The fourth proportional to 666.29, 918.35 and 467.18 is: 643.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.29 : 918.35 = 467.18 : x
  2. Step 2: Convert to fraction form
    666.29/918.35 = 467.18/x
  3. Step 3: Cross multiply
    666.29x = 918.35 × 467.18
  4. Step 4: Simplify right side
    666.29x = 429,040.81
  5. Step 5: Solve for x
    x = 429,040.81/666.29
  6. Step 6: Final answer
    x = 643.92

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Why These Related Problems?

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