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Finding the Fourth Proportional to 681.09, 939.51 and 460.10

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Solution

The fourth proportional to 681.09, 939.51 and 460.10 is: 634.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.09 : 939.51 = 460.10 : x
  2. Step 2: Convert to fraction form
    681.09/939.51 = 460.10/x
  3. Step 3: Cross multiply
    681.09x = 939.51 × 460.10
  4. Step 4: Simplify right side
    681.09x = 432,263.85
  5. Step 5: Solve for x
    x = 432,263.85/681.09
  6. Step 6: Final answer
    x = 634.66

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1.5x scale

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.