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Finding the Fourth Proportional to 612.98, 918.61 and 304.54

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Solution

The fourth proportional to 612.98, 918.61 and 304.54 is: 456.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.98 : 918.61 = 304.54 : x
  2. Step 2: Convert to fraction form
    612.98/918.61 = 304.54/x
  3. Step 3: Cross multiply
    612.98x = 918.61 × 304.54
  4. Step 4: Simplify right side
    612.98x = 279,753.49
  5. Step 5: Solve for x
    x = 279,753.49/612.98
  6. Step 6: Final answer
    x = 456.38

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1.5x scale

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.