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Finding the Fourth Proportional to 460.81, 690.61 and 411.77

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Solution

The fourth proportional to 460.81, 690.61 and 411.77 is: 617.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.81 : 690.61 = 411.77 : x
  2. Step 2: Convert to fraction form
    460.81/690.61 = 411.77/x
  3. Step 3: Cross multiply
    460.81x = 690.61 × 411.77
  4. Step 4: Simplify right side
    460.81x = 284,374.71
  5. Step 5: Solve for x
    x = 284,374.71/460.81
  6. Step 6: Final answer
    x = 617.12

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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.