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Finding the Fourth Proportional to 612.17, 918.51 and 265.33

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Solution

The fourth proportional to 612.17, 918.51 and 265.33 is: 398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.17 : 918.51 = 265.33 : x
  2. Step 2: Convert to fraction form
    612.17/918.51 = 265.33/x
  3. Step 3: Cross multiply
    612.17x = 918.51 × 265.33
  4. Step 4: Simplify right side
    612.17x = 243,703.24
  5. Step 5: Solve for x
    x = 243,703.24/612.17
  6. Step 6: Final answer
    x = 398.10

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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.