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Finding the Fourth Proportional to 660.04, 910.96 and 423.92

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Solution

The fourth proportional to 660.04, 910.96 and 423.92 is: 585.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.04 : 910.96 = 423.92 : x
  2. Step 2: Convert to fraction form
    660.04/910.96 = 423.92/x
  3. Step 3: Cross multiply
    660.04x = 910.96 × 423.92
  4. Step 4: Simplify right side
    660.04x = 386,174.16
  5. Step 5: Solve for x
    x = 386,174.16/660.04
  6. Step 6: Final answer
    x = 585.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.