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Finding the Fourth Proportional to 435.51, 650.03 and 391.77

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Solution

The fourth proportional to 435.51, 650.03 and 391.77 is: 584.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.51 : 650.03 = 391.77 : x
  2. Step 2: Convert to fraction form
    435.51/650.03 = 391.77/x
  3. Step 3: Cross multiply
    435.51x = 650.03 × 391.77
  4. Step 4: Simplify right side
    435.51x = 254,660.29
  5. Step 5: Solve for x
    x = 254,660.29/435.51
  6. Step 6: Final answer
    x = 584.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.