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Finding the Fourth Proportional to 618.63, 929.16 and 579.75

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Solution

The fourth proportional to 618.63, 929.16 and 579.75 is: 870.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.63 : 929.16 = 579.75 : x
  2. Step 2: Convert to fraction form
    618.63/929.16 = 579.75/x
  3. Step 3: Cross multiply
    618.63x = 929.16 × 579.75
  4. Step 4: Simplify right side
    618.63x = 538,680.51
  5. Step 5: Solve for x
    x = 538,680.51/618.63
  6. Step 6: Final answer
    x = 870.76

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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.