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Finding the Fourth Proportional to 618.08, 928.72 and 579.20

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Solution

The fourth proportional to 618.08, 928.72 and 579.20 is: 870.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.08 : 928.72 = 579.20 : x
  2. Step 2: Convert to fraction form
    618.08/928.72 = 579.20/x
  3. Step 3: Cross multiply
    618.08x = 928.72 × 579.20
  4. Step 4: Simplify right side
    618.08x = 537,914.62
  5. Step 5: Solve for x
    x = 537,914.62/618.08
  6. Step 6: Final answer
    x = 870.30

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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.