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Finding the Fourth Proportional to 962.45, 1,326.76 and 681.81

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Solution

The fourth proportional to 962.45, 1,326.76 and 681.81 is: 939.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.45 : 1,326.76 = 681.81 : x
  2. Step 2: Convert to fraction form
    962.45/1,326.76 = 681.81/x
  3. Step 3: Cross multiply
    962.45x = 1,326.76 × 681.81
  4. Step 4: Simplify right side
    962.45x = 904,598.24
  5. Step 5: Solve for x
    x = 904,598.24/962.45
  6. Step 6: Final answer
    x = 939.90

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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.