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Finding the Fourth Proportional to 661.51, 912.85 and 366.83

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Solution

The fourth proportional to 661.51, 912.85 and 366.83 is: 506.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.51 : 912.85 = 366.83 : x
  2. Step 2: Convert to fraction form
    661.51/912.85 = 366.83/x
  3. Step 3: Cross multiply
    661.51x = 912.85 × 366.83
  4. Step 4: Simplify right side
    661.51x = 334,856.20
  5. Step 5: Solve for x
    x = 334,856.20/661.51
  6. Step 6: Final answer
    x = 506.20

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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.