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Finding the Fourth Proportional to 894.47, 1,340.94 and 621.09

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Solution

The fourth proportional to 894.47, 1,340.94 and 621.09 is: 931.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.47 : 1,340.94 = 621.09 : x
  2. Step 2: Convert to fraction form
    894.47/1,340.94 = 621.09/x
  3. Step 3: Cross multiply
    894.47x = 1,340.94 × 621.09
  4. Step 4: Simplify right side
    894.47x = 832,844.42
  5. Step 5: Solve for x
    x = 832,844.42/894.47
  6. Step 6: Final answer
    x = 931.11

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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.