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Finding the Fourth Proportional to 618.01, 926.78 and 309.53

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Solution

The fourth proportional to 618.01, 926.78 and 309.53 is: 464.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.01 : 926.78 = 309.53 : x
  2. Step 2: Convert to fraction form
    618.01/926.78 = 309.53/x
  3. Step 3: Cross multiply
    618.01x = 926.78 × 309.53
  4. Step 4: Simplify right side
    618.01x = 286,866.98
  5. Step 5: Solve for x
    x = 286,866.98/618.01
  6. Step 6: Final answer
    x = 464.18

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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.