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Finding the Fourth Proportional to 1,041.06, 1,436.43 and 621.56

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Solution

The fourth proportional to 1,041.06, 1,436.43 and 621.56 is: 857.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.06 : 1,436.43 = 621.56 : x
  2. Step 2: Convert to fraction form
    1,041.06/1,436.43 = 621.56/x
  3. Step 3: Cross multiply
    1,041.06x = 1,436.43 × 621.56
  4. Step 4: Simplify right side
    1,041.06x = 892,827.43
  5. Step 5: Solve for x
    x = 892,827.43/1,041.06
  6. Step 6: Final answer
    x = 857.61

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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.