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Finding the Fourth Proportional to 660.50, 910.87 and 474.91

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Solution

The fourth proportional to 660.50, 910.87 and 474.91 is: 654.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.50 : 910.87 = 474.91 : x
  2. Step 2: Convert to fraction form
    660.50/910.87 = 474.91/x
  3. Step 3: Cross multiply
    660.50x = 910.87 × 474.91
  4. Step 4: Simplify right side
    660.50x = 432,581.27
  5. Step 5: Solve for x
    x = 432,581.27/660.50
  6. Step 6: Final answer
    x = 654.93

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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.