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Finding the Fourth Proportional to 618.42, 928.53 and 388.29

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Solution

The fourth proportional to 618.42, 928.53 and 388.29 is: 583.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.42 : 928.53 = 388.29 : x
  2. Step 2: Convert to fraction form
    618.42/928.53 = 388.29/x
  3. Step 3: Cross multiply
    618.42x = 928.53 × 388.29
  4. Step 4: Simplify right side
    618.42x = 360,538.91
  5. Step 5: Solve for x
    x = 360,538.91/618.42
  6. Step 6: Final answer
    x = 583.00

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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.