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Finding the Fourth Proportional to 846.08, 1,166.66 and 621

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Solution

The fourth proportional to 846.08, 1,166.66 and 621 is: 856.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.08 : 1,166.66 = 621 : x
  2. Step 2: Convert to fraction form
    846.08/1,166.66 = 621/x
  3. Step 3: Cross multiply
    846.08x = 1,166.66 × 621
  4. Step 4: Simplify right side
    846.08x = 724,495.86
  5. Step 5: Solve for x
    x = 724,495.86/846.08
  6. Step 6: Final answer
    x = 856.30

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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.