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Finding the Fourth Proportional to 683.03, 942.30 and 421.19

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Solution

The fourth proportional to 683.03, 942.30 and 421.19 is: 581.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.03 : 942.30 = 421.19 : x
  2. Step 2: Convert to fraction form
    683.03/942.30 = 421.19/x
  3. Step 3: Cross multiply
    683.03x = 942.30 × 421.19
  4. Step 4: Simplify right side
    683.03x = 396,887.34
  5. Step 5: Solve for x
    x = 396,887.34/683.03
  6. Step 6: Final answer
    x = 581.07

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Half scale
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Double scale
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1.5x scale

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.