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Finding the Fourth Proportional to 883.39, 1,219.04 and 485.03

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Solution

The fourth proportional to 883.39, 1,219.04 and 485.03 is: 669.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.39 : 1,219.04 = 485.03 : x
  2. Step 2: Convert to fraction form
    883.39/1,219.04 = 485.03/x
  3. Step 3: Cross multiply
    883.39x = 1,219.04 × 485.03
  4. Step 4: Simplify right side
    883.39x = 591,270.97
  5. Step 5: Solve for x
    x = 591,270.97/883.39
  6. Step 6: Final answer
    x = 669.32

Related Problems

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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.