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Finding the Fourth Proportional to 962.00, 1,326.80 and 621.20

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Solution

The fourth proportional to 962.00, 1,326.80 and 621.20 is: 856.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.00 : 1,326.80 = 621.20 : x
  2. Step 2: Convert to fraction form
    962.00/1,326.80 = 621.20/x
  3. Step 3: Cross multiply
    962.00x = 1,326.80 × 621.20
  4. Step 4: Simplify right side
    962.00x = 824,198.42
  5. Step 5: Solve for x
    x = 824,198.42/962.00
  6. Step 6: Final answer
    x = 856.76

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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.