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Finding the Fourth Proportional to 461.50, 687.80 and 457.68

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Solution

The fourth proportional to 461.50, 687.80 and 457.68 is: 682.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.50 : 687.80 = 457.68 : x
  2. Step 2: Convert to fraction form
    461.50/687.80 = 457.68/x
  3. Step 3: Cross multiply
    461.50x = 687.80 × 457.68
  4. Step 4: Simplify right side
    461.50x = 314,792.30
  5. Step 5: Solve for x
    x = 314,792.30/461.50
  6. Step 6: Final answer
    x = 682.11

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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.