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Finding the Fourth Proportional to 1,062.81, 1,466.64 and 621

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Solution

The fourth proportional to 1,062.81, 1,466.64 and 621 is: 856.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,062.81 : 1,466.64 = 621 : x
  2. Step 2: Convert to fraction form
    1,062.81/1,466.64 = 621/x
  3. Step 3: Cross multiply
    1,062.81x = 1,466.64 × 621
  4. Step 4: Simplify right side
    1,062.81x = 910,783.44
  5. Step 5: Solve for x
    x = 910,783.44/1,062.81
  6. Step 6: Final answer
    x = 856.96

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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.